I have some Sitka clothing, and am quite impressed with it's warm weather capacity to keep me cool, but haven't tried the cold gear yet. However, the two kids who started the company are both alpine climbers as well as hunters. I was told that they got tired of trying to find high-tech clothing for hunting and decided to make their own, combining the fabric technology of alpine mountaineering with the needs of hunting archers. The textiles major at University of CA, Davis(their alma mater)may well have provided them with help in researching the fabrics, since neither of them have backgrounds in textiles science. When you're climbing alpine it's not a good thing to get sweaty-you tend to freeze to death-and I have no doubt that the fabrics they've chosen will work well. I also like the stretch built into many of the garments, and it appears that when you're fully kitted out, you don't look like the Michelin tire guy! Next season, I'll be combining Sitka with some wool to get the best of both worlds. I know they both bowhunt, and like I said, my warm weather gear really surprised me with it's effectiveness!