Foothold : A refined last works with the reinforced top arm of the sensifit, holding your foot comfortably in place, especially moving downhill. Stability and cushioning : The Advanced Chassis helps stabilize your heel, and it's surrounded by generous cushioning for maximum comfort on the trail. Grip : Two different types of rubber result in better grip. A patterned area on the heel grabs terrain more aggressively, giving you more control especially on descents.