Poly pros are great - I keep a pair in my truck all the time. They helped me get through some brutal winters along the DMZ in Korea - they keep you warm and do a great job wicking. Just be sure not to dry them out next to the fire or with a hair dryer... or near a hot stove...

I've melted a lot of poly pro. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />