The Men's Patagonia Capilene Thermal Zip Neck is the perfect day to day baselayer. Capilene base layers are highly durable and can take the stress of everyday use. They're made with Polygiene odor control to prevent buildup of unwanted smell and are backed by Patagonia's lifetime guarantee. The Polartec Power Grid fabric is a polyester / spandex blend designed to move comfortably during any activity with our restriction or bulk. The warmth to weight ratio is high, producing ample body heat with minimal space. The long 1/4 zip allows the body to vent and aids in layering. Enhance your winter season with the Patagonia Capilene Thermal Zip Neck. [+]