Rawganique
Excellent for a strict standard: organic cotton, linen, hemp and plastic-free basics, with a serious anti-PFAS, anti-microplastic, biodegradable stance from Washington state.
For wool items, ask directly about superwash and resin finishing before you trust them.
A US source in the The Second Skin directory. Check that it ships to Europe; where it does not, the directory lists a European alternative alongside it.