Heather. Check out www.wintertrekking.com
it is a Canadian/Northern US site for deep winter camping. There is a lot of info on sub zero clothes (mostly traditional wool) and sleeping systems. Lots of posts on the forums about using fur ruffs on anoraks (which are often made of cotton). I learned that the whole "cotton kills" in winter doesn't apply when the temps are below zero.

Check out this company as well for some interesting clothes-
www.empirecanvasworks.com
_________________________
Don't get me started, you know how I get.