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.