The Cylinder II Mountain bike shoe offers the comfort you d expect from Giro with the convenience and precision of a Boa dial closure. With a single dial and a set-and-forget front strap, you can get into your shoes and onto the trails in no time. The Boa L6 dial offers 1mm adjustment increments when tightening, and a macro-release function to get out of the shoe. The upper construction provides great support and breathability, while our proprietary co-molded nylon and rubber lugged outsole provides remarkable durability with reliable traction on almost any surface and is SPD compatible.Upper:Boa L6 (1mm + with macro release) retention with lower-volume strapToe and heel microfiber reinforcementsSynthetic upperOutsole:Co-moulded nylon and rubber high-traction lugged outsoleMid-foot scuff guardAccommodates steel toe spikesSPD CompatibleFootbed:Die-cut EVA footbedsWeight:315 grams (size 42)