MTB Gravel Elegance and Style. Features 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.