Built for resort skiing and slackcountry exploration, the Sentinel AR takes the advanced fabric technologies and meticulous design common to all Arc'teryx shells and incorporates snow-specific features and a modern, relaxed fit. Long underarm vents let you dump heat during high energy chair laps and bootpacks, while the roomy fit accommodates multiple layers for cold descents. A warm flannel backer provides additional insulation against icy blasts on the chairlift. A fully adjustable storm hood, drawcord hem and cuff adjusters offer complete protection from the elements, and the front zip, underarm vents and pockets all feature water-resistant zippers. The overall build quality is top-notch, with tight seam tolerances and articulated construction that accommodates any move you need to make. Completely waterproof, breathable and durable GORE-TEX construction. Hard-wearing 70-denier face fabric. Warm flannel backing provides light insulation. Micro seam allowance of 1.6mm and extra narrow 8mm seam tape reduce bulk and weight. Articulated construction for freedom of movement. Underarm gussets keep jacket from lifting when you're reaching overhead. Adjustable storm hood is helmet-compatible, with a laminated brim to deflect rain and snow. Tall collar with brushed microsuede chin guard. Highly water-resistant external zippers used throughout. Pit zips for easy venting. Zippered hand pockets. Internal chest pocket with laminated zip. Internal mesh dump pocket. Sleeve pocket carries your ski pass or ID. Laminated, die-cut Velcro cuff adjusters reduce bulk, and won't catch or tear off. Drop hem provides extensive coverage, with cordlock adjusters. Powder skirt with gripper elastic and snap closure. Can be fastened to Arc'teryx ski pants to prevent snow entry. Hidden Recco reflector can be detected by rescue crews at many ski resorts. Not a substitute for avalanche gear and know-how in the backcountry. Women's specific fit accommodates multiple thermal layers.