Wool. (1) Look up 'mulesing' (2) I have been present at sheep shearing, the shearers are paid per sheep = go as fast as possible = terrified sheep with cuts to their skin (3) the sheep are raised for food (4) angora, have a look at how that wool is obtained.
Yes wool from a pet animal, fine, I would have no problem with that. Or even will recycled from an old garment found at a charity shop (but good luck with finding such a thing). Similarly a duvet or coat made from feather and down that had dropped naturally from a bird as part of a moult or regrowth.
Natural humans, what we ate or wore thousands of years ago, or even hundreds of years ago: I hear this often, from people with cars, central heating, internet, microwave ovens, TV in every room...
Just explaining my rationale here, not proselytising.