The Women's Arc'teryx Sentinel Insulated Jacket is an insulated shell for enjoying every moment of a frigid, cold, bluebird day. It all begins with a GORE-TEX 2L ePE membrane and super-durable face fabric, designed to provide waterproof, windproof, breathable protection and handle abrasion. An ample layer of Coreloft insulation traps heat close to the body, while a lighter layer is placed at the underarms, plus pit zippers help even out the temperature level. There are plenty of ski and snowboard features: the helmet-compatible StormHood, powder skirt, RECCO reflector, and lots of pockets, so you can hit the slopes morning to night.