The cylinder mountain bike shoe offers the comfort youd expect from giro with the quick adjustment provided by a boa dial with a single dial and a set and forget front strap you can quickly get in your shoes and hit the trails the boa l6 dial offers 1mm adjustment increments when tightening with macro release function the co molded nylon and rubber lugged outsole provides high traction and durabilityupperboa l6 1mm with macro release retention with lower volume straptoe and heel microf