The Patagonia Women's Capilene Thermal Weight Crew Top cranks up the heat while keeping bulk to a minimum thanks to its exclusive Polartec Power Grid fabric. A lofted grid pattern on the inside traps heat and wicks sweat so you stay dry and warm, and spandex helps it move with you under layers for unrestricted mobility while you're skiing, skinning, climbing, or trekking. Polygiene permanent odor control keeps funky smells at bay so you don't have to wash your baselayer after each tour.