This ultra -light windshirt performs outrageously well in the mountains, yet stuffs into its own pocket (smaller than a snowball). Worn alone, it provides weather protection and next-to-skin comfort on blustery days. Wind-resistant by construction (a tightly woven 2.3-oz. microdenier polyester), the Hel ium is treated with a DWR (durable water repellent) finish to shed light precipitation. Two critical features, a zippered turtleneck and waist drawcord, help you dial in your body temperature whatever the conditions. Imported.