Heat-reflective, super light and rigid Carbon and Anodized Fibreglass outsole with thru ventilation. Stiffness and rigidity for ultra power transfer. Vent system designed for superior underfoot airflow. Two insoles for different weather conditions: Blue with the Ergo Air vent system for hot weather and Red without vents for cold weather. Perforated Microfibre and Nylon mesh upper for maximum breathability. Wide single reverse closure strap for rapid fitting. SPD, SPD-SL, Time, Look and Speedplay cleat compatible. Visual Display for cleats position, Molded heel with 6 side vents and molded toes with 3 vents. The 360 degree ventilation system makes it the ideal triathlon shoe. Weight : 10 oz (size 42)