PEARL iZUMi X-Alp Summit Shoe – Women’s. The Pearl Izumi X-ALP Summit Mountain Bike Shoe is a technical one designed to deliver superior comfort and durability for aggressive all-day comfort and all-mountain riding. Its rugged construction lends maximum durability when deep in the wooded backcountry or exposed desert slickrock. The X-ALP Summit uses a seamless upper that cradles the foot preventing any seams or hotspots that could lead to irritation. The closures consist of two lower hook-and-loop straps and a 1:1 Anatomic Buckle Closure System further up to dial in fit while removing pressure from your instep.