Cotton pillow Covers a Cause of acne ?

micro 'fabric' is horrible it is plastics

cotton has never caused a problem/soaps,softers and bleach
can i have to double rinse my laundry

Can't say but silk is supposed to prevent wrinkles. I can't vouch for it though, as my face is beyond saving.

No idea, but anecdotally I've always used pure cotton bed linen and haven't had acne since I was a teenager. I would imagine that not washing pillow covers frequently enough might cause a build-up of bacteria, which might cause skin infections.

Dirty bedding is likely to increase any risk whether cotton or any other.
I thought acne was caused by excessive grease and hormone secretion, my sympathy goes to anyone afflicted.