The lightweight Pro Race shoe features our new ultralight and rigid Carbon HM Air Lite outsole and a 4.3 mm carbon platform for great power transfer and ventilation. The Pro Race offers maximum adjustability: the ratchet closure system is adjustable laterally and vertically to fit all types of foot soles, the cleats can be moved 7 mm back and forth, the microadjustable ratchet and offset velcro straps provide effective support, and a replaceable thinner heel pad allows for a more natural walk. Offset straps: Provide effective heel supportHRS 300 reinforced injected nylon: Secures the heel in place, optimizes fit, and reduces loss of power from slippageLateral and vertical positioning ratchet: Effective support for various types of forefoot pedalingMicrofibre upper with polyurethane membrane: Stiff, shiny, easy to cleanInterchangeable Ice Fil Ergo AirR Cool Stuff blue double density EVA and Hot Stuff red antibacterial insoles: Patented system for riding in all weather conditions. One way anti slip spandex : Maintains heel in place. Heel reflector : Improves visibility. Shoe bag included. Cleat position indicator compatible with DURA ACE, SPD, SPD SL, TIME, LOOK and SPEEDPLAY cleats. Approximate weight size 381 shoe : 273 g 9.6 oz. Ergo air insoles interchangeable. Feather weight. Optimum Fit.