Patagonia designed the Capilene Thermal Weight Zip Neck to keep you warm in cold conditions. A breathable lofted base layer made from Polartec Power Grid fleece, the open-grid pattern next-to-skin provides superior warmth & enhanced moisture management. A Hei Q Fresh treatment adds durable odour control, & the half zip enables fast venting. Suitable for a range of cold-weather pursuits, the slim fit makes it easy to layer.