La Sportiva Men's Katana Climbing Shoe 100% Leather Synthetic sole Slingshot rand maintains lateral support without making this shoe too stiff. Powerhinge technology combines with the slingshot rand to make sure that, when you're weighted on an edge, the back half of the shoe stretches while the toes stay in place for grip. Vibram XS Edge keeps you stuck to the tinniest holds, won't creep when you're smearing, and is resistant to deformation on super-sharp edges. Pacific lining in the forefoot adds toe-knuckle comfort while Dentex in the back helps wick moisture. 1.1mm LaspoFlex at the forefoot uses a super-lightweight, super-thin synthetic laminate for torsional rigidity. Hook-and-loop closure for quick and easy on and off.