Bamboo vs Cotton Pyjamas: Which is Better for Sleep?

Cotton pyjamas. We’ve all had them. They’re fine. Familiar. Perfectly acceptable.

But ‘fine’ isn’t really what we’re going for when it comes to sleep, is it? You spend a third of your life in bed. Your pyjamas deserve a little more thought than ‘eh, they’ll do’.

So we went digging. Not just brand claims and marketing fluff, actual peer-reviewed textile research. Because if we’re going to tell you bamboo is better, we want to show you exactly why.

 

The short answer

For sleep specifically, bamboo wins. It’s more breathable, wicks moisture faster, stays softer for longer, and has better antibacterial properties than cotton. Cotton is a great fabric honestly, it is but bamboo is built for exactly what your body needs while you sleep.

Here’s the proof.

Breathability: bamboo isn’t even close

This is the big one. And we didn’t just make this up.

A 2024 university study tested the air permeability of bamboo and cotton fabrics under standardised ISO lab conditions. The result? Bamboo clocked 380 mm/s. Cotton managed 172 mm/s. That makes bamboo 2.2 times more breathable than cotton — not a little bit more breathable, more than twice as breathable.

A separate 2017 study backed this up, confirming that bamboo has lower thermal conductivity than cotton — meaning it holds onto less of your body heat while you sleep.

What this means at 2am: bamboo lets air move through the fabric while you sleep, helping your body regulate its own temperature. Cotton traps heat against your skin. If you’ve ever kicked off the covers in the middle of the night wearing cotton pyjamas, now you know why.

Moisture-wicking: bamboo deals with sweat. Cotton just... holds it.

Same study, different test. When it comes to water absorption, bamboo scored 24. Cotton scored 15. That’s 60% higher absorption capacity for bamboo  meaning it pulls moisture away from your skin significantly faster.

Cotton absorbs sweat too, but then it just... sits with it. That damp, clingy feeling you get in cotton pyjamas after a warm night? That’s cotton holding moisture against your skin rather than releasing it.

Bamboo absorbs faster and releases into the air faster. So if you wake up hot, bamboo is actively working to cool you back down. Cotton is just... there.

For anyone dealing with night sweats whether from menopause, perimenopause, or just being a naturally warm sleeper this is the difference between a good night and a miserable one. Our menopause collection was built exactly for this.

Softness: bamboo from night one, forever

The first thing people notice when they try bamboo is the softness. That silky, smooth feel that makes you pause for a second and think ‘where has this been my whole life?’

Cotton can achieve that softness too  but usually with added silicone treatments and chemical softeners. Bamboo gets there naturally, no additives needed.

And here’s the part cotton can’t compete with: bamboo gets softer with every wash. Cotton tends to stiffen a little over time. The research confirmed bamboo and cotton have comparable pilling resistance (both rated 4/5), so bamboo holds up just as well through repeated washing — it just keeps getting better to wear.

Antibacterial: bamboo naturally fights odour better

This one surprised us a little. The same 2024 study tested antibacterial properties and found bamboo had a bacterial eradication rate of 44.17%, compared to 33.33% for cotton.

In plain English: bamboo naturally inhibits the bacteria that cause odour more effectively than cotton. Your pyjamas stay fresher between washes. Particularly handy on warm Australian nights when you’re sweating a little more than you’d like to admit.

Worth noting: some of bamboo’s antibacterial properties can be reduced by chemical processing. This is why OEKO-TEX certification matters. Every Kip & Boo piece is OEKO-TEX certified independently tested, free from harmful chemicals, and held to a higher standard than a brand’s word alone.

Sensitive skin: bamboo is gentler where it counts

If your skin has started having opinions about everything it touches — welcome to the club, and also, bamboo is your new best friend.

Bamboo fibres are naturally smoother and hypoallergenic. Cotton fibres are slightly rougher at the microscopic level, which can mean more friction and irritation for sensitive or reactive skin. For women going through perimenopause or menopause when skin sensitivity often increases alongside everything else that difference is very real.

OEKO-TEX certification adds another layer of reassurance: independently verified, no nasties, just fabric that’s safe to sleep in.

Sustainability: both can be a good choice, but read the label

Bamboo as a plant is remarkably sustainable. It grows fast, needs no pesticides, uses minimal water, and regenerates without replanting. On those numbers it has a clear edge over conventional cotton farming, which is notoriously water-intensive.

The nuance: the most common bamboo fabric (bamboo viscose or rayon) is chemically processed. That doesn’t make it bad but it does mean ‘bamboo’ alone isn’t enough information. Look for OEKO-TEX certification, which confirms the finished fabric has been independently tested regardless of how it was made.

Organic cotton, certified by GOTS, is also a genuinely responsible choice. Both are better than synthetic fabrics by a long way. If you care about sustainability — and we do — look for certification on either, rather than just a green claim on a label.

Bamboo vs cotton: the scorecard

Feature	Bamboo	Cotton
Breathability	✓✓ (up to 2.2x more breathable, ISO tested)	✓
Moisture-wicking	✓✓ (absorbs up to 60% more moisture)	✓
Softness	✓✓ (silky feel that softens with every wash)	✓ (can become coarse over time)
Antibacterial properties	✓✓ (up to 44.17% bacterial reduction)	✓ (around 33.33%)
Hypoallergenic	✓✓	✓
Pilling resistance	✓✓	✓✓ (comparable)
Sustainability	✓ (when OEKO-TEX® certified)	✓ (when GOTS-certified organic)

 

So who should make the switch?

Honestly? Most women who try bamboo don’t go back. But it’s particularly worth trying if you:

• Wake up too hot or kick off the covers at 2am

• Deal with night sweats from menopause or perimenopause

• Have sensitive or reactive skin that’s fussy about fabric

• Want sleepwear that stays fresher between washes

• Are tired of pyjamas that feel a bit scratchy after six months of washing

Cotton is perfectly lovely. We’re not here to be dramatic about it. But bamboo does more of the things that matter for sleep  and once you’ve felt the difference, it’s hard to argue with your own body.

Questions we get asked a lot

What is the best sleepwear for night sweats in Australia?

Bamboo is widely considered one of the best fabrics for night sweats. It’s breathable, lightweight, and moisture-wicking, helping regulate body temperature and draw sweat away from your skin. In Australia’s warmer climate, bamboo sleepwear is a comfortable choice for hot sleepers and those experiencing hormonal temperature changes.

Are bamboo pyjamas better than cotton for night sweats?

Yes. Bamboo is up to 2.2 times more breathable than cotton and absorbs moisture up to 60% faster, helping pull heat and sweat away from your skin instead of trapping it. If night sweats are disrupting your sleep, bamboo is well worth considering.

Is bamboo or cotton better for sensitive skin?

Bamboo. Its fibres are naturally smoother and hypoallergenic, meaning less friction and less irritation. If your skin has become more reactive, especially during perimenopause or menopause, OEKO-TEX® certified bamboo is a much gentler option.

Does bamboo fabric stay soft after washing?

Yes. Bamboo maintains its softness over time and can become even softer with washing. It also has comparable pilling resistance to cotton. For best results, wash on a gentle cycle with cold or warm water and dry on low heat.

Are bamboo pyjamas worth it in Australia?

Yes — especially in Australia’s climate. Bamboo fabric is breathable, temperature-regulating, and soft against the skin, making it ideal for warm nights and humid conditions. While it can be a higher upfront investment than cotton, many women find the comfort and sleep quality make it worthwhile.

Is bamboo fabric actually sustainable?

Bamboo the plant is very sustainable,fast-growing, pesticide-free, low water. The fabric processing involves chemicals, so look for OEKO-TEX certification rather than just taking a brand’s green claim at face value. That’s what we do at Kip & Boo.

Are bamboo pyjamas worth the price?

At $69.95 worn four or five nights a week for a year or more, you’re looking at less than 25 cents a wear. They don’t lose their softness. You’re not replacing them every season. And if they genuinely help you sleep better? Worth every cent.

Ready to find out what the fuss is about?

Kip & Boo bamboo pyjamas are OEKO-TEX® certified, designed in Australia, and made for women who are done settling for “fine” sleep.

Because once you’ve slept in bamboo, going back to cotton isn’t really an option

Sweet dreams

Kate x

Want to explore more sleepwear options? We've compared bamboo to all the most popular fabrics:

• Bamboo vs Silk Pyjamas — Silk feels amazing, but how does it actually perform for everyday sleep?
• Bamboo vs Modal Pyjamas — Two ultra-soft fabrics compared on breathability, durability and care.
• Bamboo vs Linen Pyjamas — The relaxed favourite vs the performance winner.