The Lowa Ice Comp GTX ice climbing boot is specifically designed for high-performance vertical ice climbing. Developed by world champion ice climber Ines Papert, this fast mover is equipped with Black Diamonds Raptor bolt-on crampon. The whole set-up weighs up to a pound less than if you wore a traditional boot and crampon combo, giving you more energy to get up the ice. These low-bulk unisex waterproof boots are constructed with a split leather and synthetic upper with a Gore-Tex lining. The rigid nylon insole provides the stability and stiffness required for steep ice. The high sticky rubber rand increases durability and improves your smearing power.