This shoe was conceived following precise instructions from some of the best off road cyclists. This is a must have for the MTB enthusiasts who demand perfect performance and fit. INSOLE: The DMT ASL Thermo moldable insole: anyone can thermo mold the ASL insole in the oven by following the simple instructions on the tag contained inside the box. Also available as a separate accessory to add a custom fit to any DMT shoe. CLOSURE: 2 Boa System rotors. BOA System: The Boa closure system is the most advanced on the market. There is no comparison in terms of performance and safety. The exceptionally durable and light rotors are matched to stainless steel laces to provide a secure and comfortable fit. SOLE: Carbon with polyurethane inserts and replaceable studs. UPPER: Microfiber, highly breathable, seamless. TONGUE: Microfiber with holes for optimal ventilation and moisture management.