Went skiing today for the first time in 2 years - since my knee injury in 2006. We went 2 hours - all flat. My knee is hurting a little. The worst thing my glasses kept fogging up. It was 26 degrees(F). I did get too warm - I wore my Adidas nylon wind pants with some polyproplyene(lightweight) under. Top was a nylon LS tee, a fleece shirt and nylon shell jacket(waterproof - breathable). I would have been fine with either just the fleece.