In the Cordillera Huarache, every dicey pitch leads to a bone-chilling, shadowy belay. In this freeze-then-thaw environment, our full-zip top keeps your core temperature constant by dispersing moisture when you're moving and trapping bodyheat when you're stopped. Made of Capilene 4 Expedition Weight fabric - the warmest in the Capilene family - it is soft, stretchy and compressible, and has a smooth jersey face that glides beneath layers and a brushed-fleece interior that warms, wicks, and feels smooth against the skin. The full-zip front allows complete ventilation on long climbs. Made of 5.9-oz Polartec Power Dry polyester (with a touch of spandex) that has Gladiodor odor control for the garment.