Natural fibres are good for us and good for the environment. Many auto-immune diseases come with the bonus of allergies or just increased sensitivity to chemicals and pollution. That means that if you have an auto-immune condition, you might be increasing your symptoms by wearing stuff that provokes immune reactions..
So check the tag on your favourite sweater, and take special note of the material in the clothes you wear closest to your skin. And next time you go shopping, look for natural, organic fibres, like the supercool shirts in organic cotton and bamboo that Lynnea and Brian at the Squid Ink Kollective make!