The lightest insulated vest we make,and a solid performer for all endurance sports from Nordic skiing to trail running to rock climbing. The limber, quick-drying stretch woven front (94% nylon, 6% spandex) resists wind and has a DWR (durable water repellent) finish to shed snow and light rain. The back panel is made from fast-wicking Cool Weather fabric (63% nylon, 23% polyester, 14% spandex) which serves as an exhaust pipe to expel body moisture. The overall fit is clean and bulk-free, with enough stretch to allow layering without confinement. The back horizontal zippered pocket has double sliders and reflective trim that's invisible during the day. Spandex cinches the armholes and hem. Handwarmer pockets snap shut. Imported.