Women's lasted fit --> Narrower toe box and higher forefoot. Nylon Mesh Upper --> Extreme ventilation and durability. Velcro straps closure --> Easy slip-on and quick to attach. Synthetic Leather --> Easy to wash and durable. High-density Nylon outsole with patented multivent system --> Multi vent outsole providing comfort in all weather conditions. Visual display of cleat's position --> Compatible with SPD, SPD-SL, TIME, LOOK and SPEED PLAY cleats. Weight (size 38/1 shoe) 334 g/12 oz. Ergoair Interchangeable.