Synthetic Leather Easy to wash and durableNylon Mesh upper Extreme ventilation and durability. 2 reversed velcro straps closure Easy slip on and quick to attach. Neoprene tongue Better fit without pressure points. High density nylon outsole with patented multivent system Multivent outsole providing comfort in all weather conditions. Thermoplastic molded toes with 3 side vents Good protection, ventilation and durability. Visual display of cleat's position Compatible with SPD, SPD SL, TIME, LOOK and SPEED PLAY cleats. Weight size 411 show 281 g10 oz.