Mountain shoes need to be tough and rugged, given the rigorous conditions of mountain biking. The Bontrager RXL Mountain Shoe are durable as well as light weight, making them great racing shoes. They feature large mesh windows for breathability, and an external molded heel cup, for ventilation. The outsole is made with silver-level BMC carbon with dual direct-inject TPU lugs. The Bontrager RXL Mountain Shoe also feature a simple closure system with just two straps and a buckle. You can purchase the Bontrager RXL Mountain Shoe at the Trek online store for $229.99.