I wear REI base layers usually, and Capilene when it's really cold. My favorite mid layer is Polartec Powerstretch. That stuff is warm. I just got a synthetic insulated jacket from GoLite that I'll add for really cold days (like 0F and colder) when I'm standing around a lot. I wear a cheap fleece vest from Old Navy sometimes too.
My fingers and toes are the really important parts for me, though. I'll wear three layers on both my hands and feet when it's really cold (Smartwool liner socks and gloves, OR shell mittens with fleece liners, Smartwool PhD snowboarding socks, and my boots), and always have a few packs of handwarmers with me. Keeping my head warm when it's windy is crucial, too. I'll even wear my big MH Dome Perignon hat over a balaclava or thin beanie if I need to. That's right, two hats. I can't hear a thing but I'm warm, darn it.
Last edited by tigre; 01-17-2013 at 05:07 AM.