How to read fiber labels, what certifications actually prove, and how cotton compares.
Covers: Label reading, certifications, weaves, fiber comparisons.
GOTS, OEKO-TEX and OCS answer three different questions. Here's what each one checks, what it doesn't, how much non-cotton it allows, and how to verify a claim in two minutes.
Updated October 20, 2026
A legal “100% cotton” label can still leave out the thread, the elastic and the trim. Here’s how to read sheet labels, decode the marketing, and check the parts the label skips.
Updated October 20, 2026
Polyester underwear, BPA in socks, microplastics in testicles: we read the actual studies. Here's what's well established, what's still a hunch, and what you can sensibly do about it.
Updated October 20, 2026