Dual material Nylon/Carbon outsole with multi-vents. Patented ventilated system to keep you cool under warm conditions and dry under rainy conditions. 2 insoles for better performance under warm and cold conditions. Japanese synthetic leather features extreme durability and lightness. Nylon mesh upper features extreme breathability and super lightness. Ratchet strap for micro-adjustment and better support during vertical thrust. Cleat openings under sole.