The Patagonia Women's Triolet Jacket utilizes a three-layer GORE-TEX polyester fabric to deliver tough, waterproof, breathable protection from high alpine weather. Protecting us from piercing winds, water, and frozen precipitation, this jacket is also breathable and features two-way zip vents in the gusseted underarm panels to dump excess body heat and moisture. A dual-adjust drawcord hem seals out foul weather while the hood is fully adjustable and helmet-compatible for climbers, skiers, and snowboarders. It's a versatile, do-it-all shell that can stand up to heavy snow, driving wind, and pelting rain.