Is Bamboo Fabric Actually Sustainable? An Honest Look

Why this article exists

We sell bamboo clothing. We also think the way the fashion industry talks about bamboo is misleading, and that a brand selling it has an obligation to explain what it is actually selling.

So: what is bamboo fabric, is it sustainable, and what should you look for on a label?

There are two completely different “bamboo” fabrics

1. Bamboo linen (mechanically processed)

The bamboo is crushed, natural enzymes break it down, and the fibres are combed out and spun. This is a mechanical process, similar to how linen is made from flax. The result is a natural fibre in the truest sense, but it is coarse, expensive and rare. Very little clothing on the market is made this way.

2. Bamboo viscose or rayon (chemically processed)

The bamboo is dissolved in a chemical solution, then regenerated and extruded into fibre. This is how the overwhelming majority of soft, stretchy, silky “bamboo” clothing is made, including most bamboo activewear, bedding and socks.

The plant it started as was bamboo. The fabric that comes out is a regenerated cellulose fibre: viscose, or rayon.

This distinction is legally enforced

The US Federal Trade Commission requires that fabric made through the viscose process be labelled “rayon (or viscose) made from bamboo”, not simply “bamboo”. Retailers have been fined repeatedly for getting this wrong: Kohl’s and Walmart faced civil penalties in 2022, and Amazon, Macy’s and Sears paid a combined $1.26 million in 2013.

The EU takes the same position through its textile fibre naming regulation, which requires “viscose” as the fibre name on the label.

The word “organic” has a separate problem. Organic is a certification, not an adjective. Schemes such as GOTS generally cannot certify bamboo viscose, because the chemical processing disqualifies it. So “organic bamboo” on a soft, stretchy garment is, in most cases, a claim that cannot be substantiated.

So is bamboo fabric sustainable or not?

Honestly: it depends almost entirely on the processing, and partly on what you compare it to.

The genuine advantages are agricultural. Bamboo grows extremely fast, regenerates from its own root system without replanting, needs no irrigation in most climates, and requires little or no pesticide. Against conventional cotton farming, that is a real difference.

The genuine concerns are industrial. Conventional viscose production uses carbon disulphide and sodium hydroxide. In a closed-loop facility that recaptures its solvents, the environmental cost is manageable. In an uncontrolled facility it is not, and worker exposure is a serious issue. Closed-loop processes such as lyocell are substantially cleaner.

The comparison that matters most. Against polyester, a fossil-fuel plastic that sheds microplastics for its entire life and never biodegrades, bamboo viscose is still the better choice for most garments. “Better than polyester” is a lower bar than the marketing implies, but it is not nothing.

What to look for on a label

“Viscose from bamboo” or “rayon from bamboo”, accurate labelling, and a sign the brand knows the rules.
“Bamboo lyocell”, closed-loop processing. The cleanest version of bamboo fabric.
“100% bamboo” with no fibre name, either mechanically processed bamboo linen (rare, and it will feel coarse), or non-compliant labelling.
“Organic bamboo” on something soft and stretchy, treat with scepticism, and ask which body certified it.
OEKO-TEX certification, tells you the finished fabric was tested for harmful substances.

What our bamboo actually is

Ours is bamboo lyocell, the closed-loop route described above. The solvent used to dissolve the bamboo is captured and reused rather than released, which makes it the cleanest of the bamboo processing methods and substantially better than conventional viscose.

It is still a regenerated fibre, not bamboo taken straight from the stalk. We call it bamboo lyocell rather than simply “bamboo” because that is what it is, and because the labelling rules above exist for good reason.

Our swimwear and cotton activewear use natural cotton, blended with a small percentage of spandex for stretch and shape recovery.

Why we would rather tell you this

Ocean Heaven exists because we think most swim and activewear is made from plastic and sold with vague language. It would be hypocritical to then sell you bamboo with vague language of our own.

Bamboo is a good fabric. It is soft, it breathes, it feels wonderful in tropical heat, and it comes from a plant that grows back on its own. It is also, in most cases, a processed fibre rather than a natural one straight from the stalk, and you deserve to know which you are buying.