Materials
What the fiber is, before anyone tells you what it means.
Each page starts with the processing — the actual chemistry and the actual supply chain — then sets out which certificates reach it and which marketing claims the law will test. The order matters: most material claims fail at the first step.
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Bamboo
Claims tested: “Natural”, “antibacterial”, “biodegradable”
Almost all bamboo textile is viscose rayon: the plant is dissolved in caustic soda and carbon disulphide, and nothing of the original fiber survives. The FTC has acted on this specific wording.
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Recycled polyester
Claims tested: “Recycled”, “closed loop”
rPET is 9.3 Mt of a 132 Mt fiber market — 12% of polyester, down from 12.5%. About 98% comes from drinks bottles, under 1% from recycled textiles. Closed loop it is not.
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Hemp vs cotton
Claims tested: “Uses less water”
Side by side on water, land, yield and retting, with the figures separated by whether they describe the field or the finished cloth — which is where most comparisons quietly cheat.
Nothing matches that.