Recommended for: fast and light alpine, mixed, and ice climbing. This high performance alpine boot with an integrated gaiter is designed with a close-to-ground outsole, an anatomical fit feature that uses memory foam to contour to the foot&';s shape to help prevent fatigue, and a slingshot heel for secure foothold, comfort and rock feel. Very stiff underfoot, insulated yet extremely light in weight for a low altitude mountaineering boot, and automatic crampon-compatible, this is truly a "Formula One" boot for mixed climbing and low altitude expeditions. Featuring a durably waterproof/breathable GORE-TEX lining to protect feet from the elements. Style Number: 2303157299