Combining Polartec PowerGrid with a secondary stretch woven over the wrists, chest, and hood, this midlayer delivers key protection during ascents when breathability is paramount. Woven fabric in critical wear areas lets you wear this as an outer piece as well as an insulating midlayer. Built to move the way you do during mountaineering, with greater shoulder and arm mobility. PowerGrid stretch fleece traps air for exceptional insulation value. Material: Polyester, Elastane.