Bamboo vs Fleece for Baby Sleep: Which Fabric Is Better?

The short answer

For a nursery kept at a normal indoor temperature, bamboo viscose is the better everyday choice, because it moves heat and moisture away from the skin instead of holding them. Fleece is an insulator, and it earns its place in a cold room or as an outer layer, not as default sleepwear for a heated house.

Your situation	What to put them in	Why
Room at 20–22 °C (68–72 °F)	Bamboo viscose sleepwear, no extra layer	The temperature range paediatric guidance treats as comfortable already; added insulation is what pushes a baby too warm
Room below 16 °C (61 °F)	Bamboo base layer plus a higher-rated sleep sack	Layering lets you remove warmth at 3 am; a single thick garment does not
Cold pram walk, car seat, cabin	Fleece, over sleepwear — and off again before the car seat harness	Fleece is light for the warmth it gives, which is what outerwear needs; bulk under a harness is a separate hazard
Baby runs hot, sweats, or has eczema	Bamboo viscose or a smooth cotton knit	Trapped sweat is the irritant; a synthetic pile holds more of it against the skin
Baby under 9 months	Either, in the correct size, nothing loose	US sleepwear rules turn on fit, not on fibre

The rest of this guide explains what each fabric is, what the labels are legally required to say, how the two fabrics age, and which of the claims you have read about bamboo are supportable. Some of them are not, and one of them has cost two large US retailers a combined 5.5 million dollars in penalties.

What “bamboo” baby sleepwear actually is, and why the label says rayon

Bamboo sleepwear is almost never bamboo fibre. It is rayon, made from bamboo pulp that has been dissolved in chemicals and spun into a new filament. That is a regenerated cellulose fibre, and US labelling law treats it as such.

The Federal Trade Commission is explicit on this point. Its guidance states that unless a product is made directly with bamboo fibre, it cannot be called bamboo, and that a rayon product derived from bamboo should be labelled and advertised using the proper generic name, such as rayon or “rayon made from bamboo”.

This is enforced rather than advisory. In April 2022 the FTC settled actions against Kohl’s and Walmart over exactly this, with civil penalties of 2.5 million and 3 million dollars, 5.5 million in total. The charges covered both the bamboo labelling and the environmental claims made alongside it, on the basis that turning bamboo into rayon requires toxic chemicals and produces hazardous pollutants, which makes “eco-friendly process” language on such a garment misleading.

The European position lands in the same place by a different route. Regulation (EU) No 1007/2011 on textile fibre names requires the generic fibre name on the label, and the permitted name for this fibre is viscose, not bamboo. A garment sold in the EU with “100% bamboo” on the composition label is mislabelled under that regulation, whatever the marketing on the front of the packet says.

Three consequences follow for anyone buying baby sleepwear.

• The word on the care label tells you the process. A label reading 100% rayon from bamboo, or 100% viscose from bamboo, is the correct one. A label reading 100% bamboo on a soft knit is a warning sign about the seller rather than about the garment.
• Claims that the bamboo plant is antibacterial do not transfer to the fabric. The FTC’s position is that the chemical processing destroys the properties of the original plant, so antimicrobial, odour-resistant and similar claims need evidence about the finished textile. We make no such claim about ours, and you should treat anyone who does with suspicion.
• Bamboo viscose cannot carry a GOTS organic certification. The Global Organic Textile Standard applies to organic natural fibres. A regenerated cellulose fibre is manufactured from dissolved pulp and falls outside that scope, which is why you will see GOTS on organic cotton sleepwear and not on bamboo viscose. If a bamboo product claims GOTS certification for the bamboo itself, that is the point to ask for the certificate number.

None of this makes bamboo viscose a worse fabric. It makes the marketing around it unreliable. What survives the scrutiny is the part that matters for sleep, and it is a physical property rather than a biological one: the fibre is cellulose, it absorbs water into the fibre itself rather than only sitting on the surface, and the knits made from it are typically thin and smooth. That combination moves heat and damp away from skin.

What fleece actually is, and where polyester fleece earns its place

Fleece is polyester, brushed on one or both sides to raise a pile. The pile is the point: it traps a layer of still air, and still air is a poor conductor of heat, which is what makes the fabric warm. Weight for weight it is one of the most efficient insulators in common clothing.

Polyester does not absorb water. A polyester garment can wick liquid along the surface of its fibres, but the fibre itself holds almost none, so in a still, enclosed situation such as a cot, moisture tends to stay where it is: between the pile and the skin. This is the mechanism behind the complaint parents actually report, which is a baby who wakes damp at the back of the neck rather than a baby who is simply too hot.

Cotton fleece exists and behaves differently from polyester fleece, absorbing moisture the way other cotton knits do. If a garment is described as fleece, check the fibre content rather than assuming. Microfleece, sherpa and polar fleece are all polyester in ordinary use; the names describe the pile height and the finish rather than the fibre.

The place where fleece is genuinely the right answer is outerwear, and the reason is a ratio rather than a preference. A fleece jacket gives more warmth per gram than a knitted one, which matters when the garment has to be carried, stuffed in a bag, or put on and taken off repeatedly during a pram walk. None of that is true of a cot.

Why babies overheat faster than adults do

Most fabric advice for baby sleepwear skips the reason the question matters, which leaves parents guessing about how much margin they have. The mechanism is worth a paragraph, because it explains why the room matters more than the month and why a baby cannot be dressed the way an adult would dress for the same room.

Three things differ.

• Surface area relative to body mass is much higher in an infant. Heat is exchanged across the skin, and a small body has proportionally more skin for the mass behind it. That cuts both ways: babies lose heat faster in a cold room and gain it faster in a warm one, which is why the comfortable band is narrower than it is for an adult.
• Sweating is less effective in the first months. The mechanism that an adult relies on to shed heat works less well in a newborn, so more of the regulation has to come from the environment and from what the baby is wearing.
• A baby cannot remove a layer. An adult who gets too warm kicks off a duvet without waking. An infant in a zipped sleepsuit inside a sleep sack has no route to do the same, which is why the layer you choose at bedtime is effectively fixed until you intervene.

That third point is the practical one, and it is the argument for layering rather than for one thick garment. Two thin layers and a sack can be reduced to one layer at 3 am. A single heavy fleece sleepsuit is all or nothing.

It is also why overheating appears in safe-sleep guidance as a modifiable risk factor while specific fibres do not. What is being managed is total insulation in a specific room, and the fabric only matters through how much warmth it contributes.

Breathability: the real difference between bamboo and fleece

Strip away the marketing and the comparison comes down to three properties, all of which are ordinary textile physics.

Property	Bamboo viscose	Polyester fleece	What it changes at 3 am
Moisture absorbed into the fibre	High, as with other regenerated cellulose fibres	Very low	Where a baby’s sweat ends up: in the fabric, or against the skin
Air permeability	High in the thin jersey knits used for sleepwear	Low, because the pile is built to stop air moving	Whether body heat can leave
Insulation for a given weight	Low	High	How warm the garment is, which is only an advantage when the room is cold

Read the table as a match between garment and room rather than as a ranking. Fleece is not a defective fabric. It is an excellent one that has been put to the wrong use when it is worn to sleep in a house at 21 °C.

One nuance is worth holding on to, because it is where most online comparisons go wrong. “Breathable” is doing two jobs in the same sentence: letting air through, and moving moisture away. A fabric can be good at one and poor at the other. A tightly woven cotton shirt is absorbent but not especially air-permeable; an open polyester mesh is air-permeable but absorbs nothing. Bamboo viscose jersey happens to score reasonably on both, which is the honest reason it works for sleepwear — not any property of the plant it started as.

Weight on the label beats the fibre name

If you compare two sleepsuits by fibre alone you will sometimes get the wrong answer, because a heavy bamboo knit can be warmer than a very light microfleece. The variable that actually decides warmth, within a fibre, is how much fabric there is.

Fabric weight is expressed in grams per square metre. Few baby sleepwear listings publish it, which is itself informative: when a seller does publish it, they are giving you something checkable. When they do not, these three hand tests get you most of the way there.

• Hold it to a light. A summer-weight jersey will show the light through it clearly. A knit that blocks the light is a layering-season garment whatever the fibre is called.
• Stretch it and let go. Fabric that stays stretched has little recovery, and it will bag at the knees and neck after a few washes regardless of how it feels new.
• Feel the inside face, not the outside. The face that touches the baby is the one that matters. A smooth outer with a fuzzy inner is an insulating construction, not a light one.

The same three tests are how to compare two bamboo garments from different sellers, which is a more common problem than choosing between fibres. There is a wide spread of quality within bamboo viscose, and the fibre name on the label tells you nothing about where a given garment sits in it.

Bamboo vs fleece for safe baby sleep: what the evidence supports

Overheating is one of the modifiable risk factors named in safe-sleep guidance, and that is a good enough reason to think about fabric weight. It is not a reason to accept the more dramatic claims made on its behalf, so here is the careful version.

The American Academy of Pediatrics advises dressing an infant in no more than one additional layer than an adult would find comfortable in the same room, and watching for signs of overheating such as sweating or a chest that feels hot to the touch. The NICHD Safe to Sleep campaign gives the same advice and adds that the baby’s head should stay uncovered during sleep.

What the guidance does not do is rank fibres. There is no paediatric body that recommends bamboo over cotton, or that names fleece as a hazard. The mechanism runs through total insulation and through the room, and a fabric only matters because of how much warmth it adds. A baby in thin bamboo pyjamas under a thick sleep sack in a warm room is dressed more warmly than a baby in a single fleece sleepsuit in a cold one.

So the practical rule is to count layers and to check the child, not to trust the fibre. Hands and feet run cool in healthy babies and will mislead you. The chest, the back of the neck and the nape are the places to feel.

Two checks are worth building into the routine, because they catch the two directions of error:

• Damp hair or a damp nape means the baby has been working to lose heat and the combination is too warm. Remove a layer rather than opening a window, which changes the room for the rest of the night.
• A cool chest with warm hands is the rarer signal and means the opposite. Add a layer, not a heavier single garment, so you keep the option of removing it.

Both fabrics have to meet the same US sleepwear rules

Children’s sleepwear sold in the United States in sizes 9 months through 14 must either pass a flammability test or qualify as a tight-fitting garment under 16 CFR parts 1615 and 1616. Untreated bamboo viscose does not pass the flame test. CPSC has stated that 100% rayon, along with 100% cotton, 100% silk and 100% modal, typically fails that testing, and bamboo viscose is a rayon.

That is why bamboo pyjamas in the US are sold under the tight-fitting exception, with a hangtag reading that the garment is not flame resistant and should be worn snug-fitting. The snug fit is the compliance route, which is also why ordering a size up in them is the one sizing decision to avoid. We have set out how that rule works, and what the yellow tag means, in our guide to the US sleepwear rules.

Polyester fleece can pass the flame test on its own, so fleece sleepwear may be sold either way. Read the label to see which route the garment took. Neither route is the safer one; they are two ways of meeting the same standard.

There is a care consequence to the tight-fitting route that rarely gets mentioned. Because compliance rests on the garment’s measured dimensions, anything that changes those dimensions matters more than it would on daywear. A snug-fit sleepsuit shrunk a full size in a hot dryer is no longer the garment that was certified. Dry it low, and treat a garment that has visibly shrunk as retired rather than as a tighter fit.

The EU has no equivalent mandatory flammability standard for children’s nightwear. European rules address other hazards, notably cords and drawstrings under EN 14682. A garment made for the US market keeps the close cut that the exception produced, which is why bamboo sleepwear bought in Europe still fits closer than daywear does.

Room temperature, TOG and choosing baby sleepwear weight

TOG is the number you will see quoted on sleep sacks, and it is worth knowing what it is. TOG is a unit of thermal resistance used in the textile trade, measured under BS 4745, where one tog equals 0.1 m²·K/W. It is not a safety certification, no US regulation requires it, and different brands arrive at their figures in different ways. Treat it as a useful relative scale within one brand rather than as a guarantee across brands.

Room temperature	A workable combination
24 °C and above (75 °F+)	A short-sleeve bamboo bodysuit on its own, or a 0.5 tog sack over one
20–23 °C (69–74 °F)	Long-sleeve bamboo sleepwear, or a bodysuit under a 1.0 tog sack
16–20 °C (61–68 °F)	Long-sleeve bamboo sleepwear under a 2.5 tog sack
Below 16 °C (61 °F)	A base layer plus long-sleeve sleepwear plus a 3.5 tog sack, and check the child rather than the chart

The reason to work from the thermometer rather than from the month is that indoor temperature does not track the season reliably. A well-heated flat in February can sit warmer than the same flat in a mild May, and it is the room the baby sleeps in, not the weather outside, that decides what they should wear.

Two adjustments to the table are worth knowing. A room thermometer placed near a radiator or an outside wall will read several degrees away from the air at cot height, so put it where the baby is. And the figures above assume a sleep sack rather than a blanket; if you are not using a sack, the sleepwear is carrying all of the warmth and the same room needs a heavier garment.

Bamboo, eczema and sensitive skin: what can and cannot be claimed

No fabric treats eczema. What clothing can do is remove two of the things that reliably aggravate it, which are mechanical friction and trapped sweat. That is the honest framing, and it still points in a clear direction.

Guidance from eczema charities is consistent about what to look for, and it is about construction as much as fibre: smooth surfaces, loose or flat seams, no scratchy trims, and layers that do not make the child sweat. A thin, smooth cellulose knit meets that description. A brushed synthetic pile worn for ten hours in a warm room does not.

Three details are worth more than the fibre choice when you are buying for a child who flares:

• Seams and labels. Flatlocked seams and a printed label rather than a sewn-in tag remove a friction point that sits exactly where a baby’s neck rubs.
• What you wash it in. Detergent residue and fabric softener are common irritants, and softener also coats fibres in a way that reduces how well they absorb moisture. Skip it on sleepwear whatever the fabric.
• Whether the garment can be washed hot when it needs to be. This is the one place where cotton beats bamboo viscose for a child with reactive skin. Cotton tolerates a 60 °C wash; bamboo viscose does not, and a fabric you cannot wash hot is a constraint during an eczema flare or an illness.

If a garment is certified to OEKO-TEX Standard 100, that is a meaningful additional signal, though not the one people usually assume. It certifies that the finished article has been tested against a list of harmful substances. It says nothing about whether the fibre is organic or about how the fabric performs.

How each fabric ages: pilling, thinning and cost per wear

Sleepwear is washed more than anything else in a child’s wardrobe, so how a fabric survives washing decides what it actually costs. The two fabrics fail in different ways, and knowing which failure you are buying is more useful than a price comparison.

Bamboo viscose thins. Regenerated cellulose fibres lose a significant share of their strength when wet, which is why hot, vigorous washing is what produces the pilling and thinning that then gets blamed on cheap fabric. Washed cool on a gentle cycle and dried low, a good bamboo sleepsuit holds up well across a size. Washed hot and tumbled hot, the same garment goes see-through at the knees and elbows within a season. The fabric is not fragile; it is specific.

Polyester fleece pills and holds odour. The raised pile is what keeps the warmth and it is also what tangles into pills under abrasion, particularly where a car seat harness or a cot mattress rubs. Pilling does not reduce the warmth much, which is why a pilled fleece is still functional even when it looks finished. The second issue is odour: polyester holds the compounds produced by skin bacteria more readily than cotton does, which is why a fleece can come out of the wash still smelling faintly of the last wear.

What that means for cost per wear:

	Bamboo viscose sleepwear	Polyester fleece
Worn	Nightly, so very high wear count	Seasonally or as an outer layer, so lower count
Fails by	Thinning and pilling, mostly from heat	Pilling, which is cosmetic, and odour retention
Care that extends it	Cool wash, gentle cycle, inside out, dry low	Wash inside out, no softener, low heat, wash separately from towels
Hand-me-down value	Moderate: still serviceable but visibly thinner	Good: pilled but still warm, which is what outerwear is for

The practical conclusion runs against the usual advice to buy the expensive one. A mid-priced bamboo sleepsuit washed correctly outlasts an expensive one washed hot, because heat rather than price is what determines the outcome. The full routine is in how to wash baby clothes.

Fleece, car seats and outdoor layers: the safety detail people miss

Because fleece is the right answer for outerwear, it runs into a hazard that has nothing to do with the fabric and everything to do with where it is worn.

A bulky garment worn underneath a car seat harness compresses when the harness is tightened, and the harness is then looser against the child than it felt when you adjusted it. The AAP’s winter car seat guidance is to avoid bulky coats and snowsuits under the harness, to buckle the child in wearing thin layers, and to put the coat on backwards over the fastened harness or use a blanket over the top.

This matters more for fleece than for a knitted jumper precisely because fleece is efficient: the warmth per gram that makes it good outerwear comes from a compressible pile, so the same garment that keeps a child warm on a pram walk is the one that compresses most under a harness.

Three habits cover it:

• Harness over thin layers, always. Sleepwear or a bodysuit and leggings, then tighten, then add warmth on top.
• Do the pinch test after every adjustment. If you can pinch a horizontal fold of webbing at the shoulder, the harness is too loose for the layers underneath.
• Keep a fleece blanket in the car rather than a thicker coat. It goes over the buckled harness and comes off without unbuckling anyone.

Microfibre shedding: the fleece trade-off nobody puts on the label

Polyester fleece sheds microfibres when it is washed, and the raised pile that gives it its warmth is exactly what makes it one of the higher-shedding fabrics in a domestic wash. A 2019 study in Scientific Reports measured microfibre release across domestic laundry conditions and found that wash volume and mechanical agitation drive release more than detergent choice does.

This is a real consideration rather than a decisive one, and it is worth stating plainly rather than either ignoring or overstating it. Two things follow that are actually actionable:

• Wash fleece less often and on a fuller load. Fleece worn as an outer layer rarely needs the wash frequency of sleepwear, and a fuller drum with less free water reduces shedding per garment.
• Use a lower spin and a shorter cycle. Both reduce mechanical agitation, which is the main lever the study identified.

Bamboo viscose is a cellulose fibre and its shed fibres are not plastic, which removes that particular issue. Its own environmental question is upstream instead, in the chemistry of turning pulp into filament — the same processing the FTC cited when it ruled that “eco-friendly” claims on bamboo rayon were misleading. Neither fabric is the clean choice; they carry different costs in different places.

Five claims about bamboo baby sleepwear that do not hold up

This category attracts more unsupported marketing than almost any other in children’s clothing. These are the five you are most likely to meet.

1. “Naturally antibacterial.” The FTC’s position is that processing bamboo into viscose destroys the properties of the plant, and claims about the finished textile need evidence about the finished textile. This is the claim class that produced the 5.5 million dollars in penalties.
2. “Wicks moisture several times faster than cotton.” Specific multiples like this circulate widely without a test method attached. Absorbency depends on the knit as much as the fibre, so a figure quoted without the fabric construction and the test standard is not a comparison of anything.
3. “Organic bamboo.” The bamboo may have been grown without pesticides, but the fibre is manufactured from dissolved pulp, and GOTS applies to organic natural fibres rather than regenerated ones. The word on a bamboo viscose label is doing marketing work, not certification work.
4. “Hypoallergenic.” The term has no enforceable definition for textiles. What reduces irritation is a smooth surface, flat seams, a printed label and no trapped sweat, and all four are visible on the garment.
5. “Thermoregulating.” A fabric can conduct heat and moisture well, which is what a thin cellulose knit does. It does not sense temperature or adjust to it, and a garment described as adjusting to the baby is describing physics that does not exist.

None of these undermine the fabric. Bamboo viscose is a good sleepwear fibre for reasons that survive scrutiny: it is thin, smooth, absorbent and air-permeable. It simply does not need the claims.

How to judge a bamboo or fleece sleepsuit in your hands

Most of what decides whether a sleepsuit is good can be checked in thirty seconds, and none of it is on the marketing copy.

Check	What good looks like	What it tells you
Composition label	Viscose or rayon from bamboo, with a percentage	A “100% bamboo” label is mislabelled in both the US and the EU
Neckline recovery	Stretches and returns flat	Wavy out of the packet only gets worse; usually no elastane in the rib
Seams at the shoulder and inside leg	Flat, bound, no ridge you can feel	These are the two seams that sit against skin all night
Label type	Printed into the fabric	A sewn-in tag at the nape is the single most common irritation point
Zip	Two-way, with a chin guard and a covered top stop	Two-way means a nappy change without undressing the upper half
Poppers, if any	Align when closed, before the first wash	A set that misaligns new will always misaligns; it is a manufacturing fault
Foot grip, if footed	Silicone across the ball and heel, not scattered dots under the arch	Grip only helps where the weight actually lands

For a footed style there is one more question that the fabric cannot answer, which is whether a footed garment is right for the stage the baby is at. That is covered in footed or footless for a crawling baby, and how each style is sized in baby sleepwear sizing.

Which to buy for your situation: bamboo vs fleece

Choose bamboo viscose when the garment will be slept in, night after night, in a room at normal indoor temperature. That is the case for most families most of the year, and it is why the fabric dominates our sleepwear range. As of September 2026 we list 240 bamboo styles for babies and 268 bamboo pyjama styles across the sizes, which you can browse in bamboo baby clothes and bamboo pyjamas.

Choose fleece when the garment is outerwear, when the room is genuinely cold, or when it goes over sleepwear rather than instead of it — and take it off before the car seat harness goes on. There is one sleeping situation where fleece is the right answer rather than the over-warm one, and that is a genuinely cold tent, where the insulation it gives for its weight is exactly what is needed; what changes when the bedroom is a tent is set out in what a baby should wear to sleep in a tent.

Choose organic cotton when you want an absorbent natural fibre with a certification that covers growing and processing rather than only the finished article, or when you need to be able to wash sleepwear at 60 °C. It is heavier than bamboo viscose at the same construction and holds moisture longer once damp, which is the trade you are making.

A reasonable default for a first baby is to own both in a ratio of about four to one: bamboo or cotton sleepwear in the quantity the laundry cycle demands, and one fleece outer layer that lives by the door. Buying fleece sleepwear for a heated house is the mistake this guide exists to prevent; owning no fleece at all is a different and smaller one.

Whichever you choose, buy the size that fits now. Sleepwear is the one category where sizing up removes the property the garment was certified on, and our sizes do not shift between fabrics: the measurements are on the PatPat size chart, and where our labels sit against the charts you already own is set out in does PatPat run small.

What this guide does not claim

We have not lab-tested these fabrics against each other, and nothing above should be read as if we had. The fibre properties described here are general textile behaviour, the regulatory statements are quoted from the CFR and from the agencies that administer it, and the safe-sleep advice is the published position of paediatric bodies rather than our own.

We also do not claim that bamboo viscose is antibacterial, odour-resistant, hypoallergenic in a clinical sense, or that it will improve any child’s skin condition. Those claims are common in this category, several of them have been the subject of FTC enforcement, and we are not going to repeat them to sell pyjamas.

The cost-per-wear and durability comparisons are descriptions of how these fibre types behave, not measurements of specific garments, and the car seat guidance is the AAP’s rather than ours.

Frequently asked questions

Is bamboo or fleece better for a baby? Bamboo, for sleeping in a normally heated room, because it lets heat and moisture escape instead of trapping them. Fleece is the better choice for outdoor layers and genuinely cold rooms.

Can babies sleep in fleece pajamas? Yes, in a cold room and in the correct size, with the usual checks for overheating. In a house at normal indoor temperature a thinner fabric is the easier choice, because fleece adds warmth you then have to take away somewhere else.

Is bamboo fabric really antibacterial? No, and the FTC has taken enforcement action over claims like this one, on the basis that processing bamboo into viscose destroys the properties of the plant. Judge the garment on breathability and fit instead.

Why does my bamboo pajama label say rayon? Because that is what it legally has to say. Bamboo sleepwear is a regenerated cellulose fibre, and US labelling law requires it to be identified as rayon or viscose rather than as bamboo.

Can bamboo baby clothes be GOTS certified? No, not the bamboo itself. GOTS covers organic natural fibres, and bamboo viscose is manufactured from dissolved pulp, so it falls outside that scope.

Are bamboo pajamas flame resistant? No, not untreated. Bamboo viscose is a rayon, and CPSC states that 100% rayon typically fails children's sleepwear flammability testing, so it is sold under the tight-fitting exception instead.

Should I size up in bamboo pajamas so they last longer? No, because snug fit is the compliance route those garments were certified on, and a loose one falls outside it. Buy the size that fits now.

What TOG do I need? It depends on the room, not the month. Roughly 0.5 tog above 24 °C, 1.0 tog at 20 to 23 °C, 2.5 tog at 16 to 20 °C, and 3.5 tog below that, then check the child's chest rather than trusting the number.

Why do my bamboo pajamas go thin so quickly? Almost always heat. Regenerated cellulose is weakest when wet, so a hot wash and a hot dryer are what thin the knee and elbow areas within a season.

Can my baby wear a fleece suit in the car seat? Not under the harness. Bulky layers compress when the harness is tightened and leave it looser than it felt, so buckle over thin layers and put warmth on top afterwards.

Is bamboo better than cotton for eczema? Not inherently. What helps is a smooth surface, flat seams, no trapped sweat and no fabric softener, and both fine cotton knits and bamboo viscose can deliver that.

How do I know if my baby is too hot? Feel the chest or the back of the neck, never the hands or feet, which run cool in healthy babies. Sweating, damp hair and a hot chest mean take a layer off.

About this article

Written and fact-checked by the PatPat Editorial Team. How we research, source and review what we publish is set out on our editorial standards page.

Method. No garments were lab-tested for this article. Fibre behaviour described here is general textile science, not a measurement of our own products. Style counts are read from our own collection pages and were current in September 2026; they move weekly.

Sources. Labelling requirements: FTC, How to Avoid Bamboozling Your Customers and the FTC’s bamboo textiles resource. EU fibre naming: Regulation (EU) No 1007/2011. Enforcement and penalty amounts: FTC on the 5.5 million dollar Kohl’s and Walmart settlements, April 2022. Scope of organic textile certification: GOTS. Sleepwear flammability: CPSC, Children’s Sleepwear and 16 CFR part 1615. Safe sleep and overheating: AAP, A Parent’s Guide to Safe Sleep and NICHD Safe to Sleep. Car seats and bulky clothing: AAP, Winter Car Seat Safety. Microfibre release in domestic washing: Scientific Reports, 2019. Clothing and eczema: National Eczema Society. Testing scope of the textile certification: OEKO-TEX Standard 100. Thermal resistance: BS 4745.

This is not medical advice. If your child has a skin condition or a breathing condition, ask your paediatrician before changing what they sleep in.

Corrections. An earlier version of this article, published in January 2026, stated that bamboo fabric is naturally antibacterial and that it wicks moisture four times faster than cotton. Neither claim was supportable and both have been removed.

Last updated 17 September 2026 · Next review September 2027