MSR Denali Ascent Unmatched on steep terrain: elevator heel lifter reduces calf fatigue Superior traction: steel traction blades with saber teeth, crampons, and molded braking bars Versatile: 4 and 8 flotation tails (sold separately) make denali ascent snowshoes a 3-in-1 package Secure fit: crampon extension plate eliminates heel drift Accommodates large boots: enlarged boot hole allows for use of snowboard and/or ski boots