Another must-have item, the best-selling TKA 100 Glacier from The North Face is a one-quarter zip lightweight fleece base layer. With nothing extra to add weight and extra-cozy fabric, the TKA is worth getting as a warmer base layer than just your long underwear.
Of all the base layers we tested, this was my favorite, simply because it had less of everything. To my mind, pockets, zips, extra fabric and styling statements are a waste of time, weight and money. Keep it simple! On the other hand, the Patagonia R1 Full Zip looked great around town and had space for wallet, phone, etc., while keeping just as warm. But they're both heavier and more than twice as expensive retail.