Bamboo Fabric Guide: What "Bamboo" Baby Clothes Actually Are

Short version: nearly every "bamboo" baby garment you can buy is rayon (or viscose) made from bamboo. This page explains what that means, what it does well, what it doesn't, and how to take care of it.

What is viscose from bamboo?

Bamboo is a fast-growing grass with hard, stiff stalks. You cannot spin those stalks into something soft enough for a newborn the way you can spin cotton. So manufacturers dissolve bamboo pulp in a chemical solution and extrude the result into fibre. That fibre is rayon, also called viscose. It's a manufactured fibre with a plant-based origin.

The US Federal Trade Commission requires this to be labelled as "rayon made from bamboo" or "viscose made from bamboo" rather than just "bamboo." In April 2022 the FTC obtained $5.5 million in civil penalties from two national retailers over exactly this labelling issue, alongside unsupported environmental claims. We follow the rule, which is why our product pages say viscose.

There is such a thing as true mechanically-processed bamboo fibre - sometimes called bamboo linen. It's rare, expensive, and much coarser. It is almost certainly not what's in your baby's pyjamas.

What it's genuinely good at

Softness and drape. Viscose fibres are smooth and round in cross-section, so the fabric sits against skin without the slight scratchiness of a short-staple cotton. This is the main reason parents get attached to it.
Stretch and recovery. Most baby bamboo garments are a viscose-spandex blend, typically around 95/5. That's why a convertible romper can fit a growing baby across several months.
Moisture handling. Viscose absorbs moisture readily, which is why it feels cool in summer heat and doesn't feel clammy.
Thermal range. It's a genuinely seasonless weight for indoor wear - the same romper works in July and January in a heated house.

What it isn't

It isn't automatically eco-friendly. The viscose process uses sodium hydroxide and carbon disulfide. Responsible producers capture and recycle those chemicals; not all do. Unless a specific producer publishes specific certifications, treat "sustainable bamboo" claims sceptically - including ours if we ever made one.
It isn't hypoallergenic in a regulated sense. "Hypoallergenic" has no legal definition for textiles. What's true and useful is narrower: the fabric is smooth, and the garments we carry are tagless with no interior seam labels, which removes two common sources of irritation. If your child has diagnosed eczema, talk to their paediatrician or dermatologist rather than relying on marketing copy from a clothing shop.
It isn't flame resistant. Snug-fitting sleepwear is sold under CPSC rules on the basis of fit, not flame treatment. These garments are not treated with flame retardants, and they must fit snugly for that reason. Do not size up in sleepwear.
It isn't as durable as cotton. Viscose is weaker when wet and pills more readily than a good combed cotton. Care matters more than it does with cotton - see below.

How to wash it so it lasts

Cold water, always. Warm or hot water is the single biggest cause of shrinkage and fibre damage in viscose.
Wash inside out, with like colours. Turning the garment inside out puts the abrasion on the interior surface, which is the main defence against pilling.
Skip the fabric softener. It coats the fibres, reduces absorbency, and over time makes the fabric feel worse rather than better. Bamboo viscose doesn't need it.
Tumble dry low, or hang. High heat is the second-biggest cause of shrinkage. Pull items out slightly damp if you can.
Wash separately from anything with velcro or zips if you can be bothered - hook fastenings snag viscose knits badly.
Cool iron only, if at all. Most of these garments don't need ironing.

Does it shrink?

Some, on the first wash, if you use heat. Following cold-wash and low-dry instructions keeps it minor. If a garment has shrunk noticeably, heat is almost always the cause.

Why does it pill?

Pilling is friction. The high-friction zones are the ones that rub against a car seat, a high chair, or a carpet - so backs of thighs, bottoms, and knees pill first. Washing inside out and skipping the dryer helps. A fabric shaver removes pills without damaging the knit.

Bamboo viscose vs cotton, honestly

	Viscose from bamboo	Cotton
Softness	Smoother, silkier hand feel	Softens over time; combed/pima is close
Stretch	Excellent with spandex blend	Less stretch unless blended
Durability	Weaker when wet, pills sooner	More robust over many washes
Price	Typically higher	Wide range, generally lower
Care	Cold wash, low dry, no softener	More forgiving

Neither one is the right answer for everyone. Cotton is more forgiving and cheaper. Bamboo viscose feels better and stretches further. Plenty of parents use both - bamboo for sleep and cotton for the daycare pile.

This page is general information about textiles, not medical advice. For any skin condition, consult a qualified healthcare professional.