The Atomic Backland Pro SL Alpine Touring Ski Boots combine the best characteristics of the Backland and Backland UL lines for a fast and light skintrack masterpiece. Engineered with durable and lightweight polyamide shell construction, these featherweight climbing machines have up to 74 degrees of motion, grippy Skywalk Rubber soles, and washable liners, so the stench of victory doesn't have to linger once the adventure is over.