"The Patagonia Capilene Thermal Weight Zip-Neck Pullover is built around Polartec Power Grid fabric, a grid-patterned construction that traps warmth close to the skin while actively moving moisture away during hard pushes through steep terrain. Whether the day starts with a frigid chairlift ride and ends with sweaty tree runs, this layer regulates temperature without asking us to stop and adjust. Elastic thumb loops close the gap between sleeve and glove so cold air stays out on exposed traverses and windy ridgelines. What Our Gearhead® Experts Are Saying:""I wear this as my go-to base layer for ski days and cold trail runs because it manages heat so well through varying effort levels. The zippered collar lets me dump warmth on the skin track without stopping to fully undress, and I'm always grateful for the anti-odor tech on multi-day trips."""