The Patagonia Women's Triolet Jacket utilizes a three layer Gore Tex polyester fabric to deliver tough, waterproof, breathable protection from high alpine weather. While protecting you from the piercing winds and frozen precipitation while on high, this jacket lets any sweaty moisture that's built up escape to keep you dry and comfortably warm. The Optimal Visibility Hood with laminated visor fits over any sized helmet and is two way adjustable to deliver enhanced visibility in even the worse conditions. If the built in breathability of this jacket isn't enough, Patagonia installed watertight, two way zip vents in the gusseted underarm panels to let you dump excess body heat without raising the body of the jacket. A dual adjust drawcord hem seals out weather, while the elasticized strap at the back connects to any Patagonia Snow pants to prevent snow from getting in when you take a spill.