The Patagonia Capilene Thermal Crew transforms your cold weather layering game with smart design that actually understands how women move in the mountains. Built with Polartec Power Grid fabric, this thermal crew delivers that perfect balance of warmth and breathability that keeps you comfortable whether you're grinding up a winter trail or settling into camp after a long day. The genius is in the details: offset shoulder seams that won't chafe under your pack straps, full underarm gussets that move with you during those steep scrambles, and a smooth exterior face that slides effortlessly under your shell. Made from 92% recycled polyester with built-in odor control, this isn't just another base layer – it's your reliable partner for multi-day adventures where staying warm, dry, and comfortable isn't optional.