Cosyfeet pride in some of their socks being cotton-rich or bamboo, which both contain 25% "plastic". Only mohair are 85% natural and "supreme comfort" would be the least bad for me: 96% natural, 4% plastic.
Sensitivity from MCAS:
But all my clothes need to be 100% cotton or on the outside 100% wool, not even 2% elastane or anything.
My body quickly "knows" and "shows" (sharp odour), even if I don't.
Unfortunately for me 100% cotton isn't 100%, manufacturers are allowed to put a few things in cotton without declaring them, and I sometimes don't tolerate these either, occasionally even the organic ones I always get.
I can't 'afford' the odour as I can't shower much or use much deodorant.
(I can just about wear a hoodie with some 'plastic' (fleece from recycled polyester) if I wear it outside a second one with only organic cotton.)
Cold extremities from Raynaud's:
Plastic in them would probably keep me warmer. But 5 pairs do keep me warm.
However sometimes (like yesterday, temperature had gone down from 16°C to 9°C) I still need a hot water bottle inside and occasionally iron oxide foot and/or hand warmers outside.
Flexible shoes necessary for 5 pairs of socks:
5 pairs are a bit tight, but I'm surprised how flexible my same shoes are - also plastic-free, except the soles, that's probably the reason for their stretchiness. (Unfortunately thus not vegan in the winter, but "Chucks" from organic cotton and natural latex soles in the summer.)
Plantar fasciitis:
A few months ago I suddenly thought that occasional foot pain for a few days was coming from folds in the socks, but couldn't prevent it by stretching them more while putting them on. 'Researching' on youtube I found it fitted to 'plantar fasciitis', did the exercises regularly and it was quickly gone. (One of many things where youtube was better than my very good acupressurist.)
deadlines are fast approaching
Good luck and a clear head for the final spurt! (Anything to proof read?)