The lightest high performance MTB shoes with a buckle that Pearl Izumi has ever made. ALL NEW full length unidirectional Carbon fiber mountain sole. Molded TPU mountain cage for durability and traction. High traction lug tips give go anywhere stability. Synthetic Heel lining for maximum heel hold. Rubber toe cap gives excellent durability. One piece, minimal upper construction designed to minimize weight. New two position low profile buckle for light weight with great adjustability..