This is an inner layer for Gamakatsu fishing wear. I'm selling it separately because I believe there's more demand than selling it as a set with Gore-Tex cold weather gear. I've worn it only in winter for about 3 years, but since I wear other inner layers as well, I don't think I've worn it very often. There are no noticeable stains or scratches. The zipper works fine and doesn't snag.