Traverse snowfields, glaciers, and difficult scree in La Sportiva's durable yet flexible Glacier Evo boots While saving your lower extremities from the elements with a snow collar incorporated into the ankle-supporting Reactive Spoiler System (RSS), the Evo helps you maintain balance and traction with the grippy Vibram Ice outsole Features: Grip the ground with the rubber Vibram Ice outsole while the polyurethane Airchushion midsole and half steel shank support and cushion your foot Keep snow, ice, and debris out of your boot with the built-in snow collar while the breathable Dri-Lex lining keeps you dry on the inside with its moisture-wicking capabilities If you stumble on steep and rugged terrain, recover your balance quickly with RSS technology that allows for maximum ankle flex Get the perfect fit every time with the removable and easy-to-adjust EZ Flex tongue Specifications: Average weight per pair: 3 lb 3 oz Upper: 28 mm leather to rubber rands Last: board lasted Lining: nylon Midsole: polyurethane Shank: steel Outsole: Vibram rubberSpecifications based on size 39