With the same Polartec' Windbloc laminate as our R4 Jacket, the vest protects your torso from the draining chill of cold wind. The ch in-friendly wind flap behind the front zip and a drawcord hem further seal in warmth. Its two handwarmer pockets are placed high so they won't interfere with pack straps or a harness. With seamless shoulders for pack comfort; flat-lock stitching and spandexbound armholes for a smooth fit