The Arcteryx Beta AR jacket is a winter bulwark for alpinists that spend life above the timber line. Ideal for alpine climbing/trekking the Beta AR’s lightweight and durable Gore-Tex 3L Pro Shell is fully taped with Gore-Seam tape creating a waterproof/weatherproof barrier that sheds snow and cuts through wind. Water Tight external zippers and a helmet compatible Drop Hood also ad to the Beta AR’s tenacious outdoor defense making life in alpine climates a whole lot better.