The Sidi MTB Gravel shoes are just the right choice for all mountain bikers and gravel bikers who don’t want to make any compromises. They feature Sidi's carbon fibre reinforced MTB competition nylon sole and offer outstanding stiffness as well as maximum power transfer. Tecno-3 System Tecno-3 System dials in fit along the entire length of the shoe, adapting the upper to the shape of the foot for a customized fit. SIDI’s famously reliable and replaceable closures are improved by an all new proprietary Sidi Wire material that is completely non-binding for intuitive and effortless on-thefly adjustments. Shock Absorber Protection Polyurethane shock absorber on the external area with inner padding. Sidi Heel Cup Reinforced cup that stabilizes and supports the heel. Anatomically shaped plastic, reduces heel slip and provides increased power transfer. Provides additional foot protection in the event of a crash. Rubber Toe Abrasion resistant material on the toe MTB Competition Sole Has been specifically studied for this specialty, may be fitted with two toe spikes on the front for traction in difficult and muddy conditions. The toe spikes are sold separately.