Patagonia Capilene Thermal Weight quarter-zip baselayer in blue. This high-performance shirt features a Polartec Power Grid fabric construction, designed to provide excellent warmth and breathability while remaining lightweight. The interior grid pattern effectively wicks moisture and traps heat, making it an ideal choice for cold-weather activities like skiing, hiking, or trail running. It includes a stand-up collar for extra protection and long sleeves. See pictures for measurements.