The women's Patagonia Capilene Lightweight Bottoms are baselayer leggings for high-output days in the cold. The ultra-lightweight stretch fabric wicks moisture away from the skin and dries quickly, and the next-to-skin fit layers cleanly under pants without feeling compressed. A perforated elastic waistband and low-bulk seams help reduce chafing, while the gusseted crotch gives you freedom to move. They're made from recycled polyester in a Fair Trade Certified factory.