Shell and Cuff: High Quality Polypropylene, Asymmetrical Streamline Shell, Total Ventilation; Closure: Aluminium Upper Micrometric Buckle, Instep Micrometric Buckle, Asymmetrical, Fast Flowing Lacing; Cushioning: Integrated Shock Absorber Device; Boot: Eco-Leather Lining, Anatomical Padding, Malleolus Comfort Area; Footbed: Anatomical; Frame: Extruded Aluminium, 3 Arch Design; Wheels: 110mm 85A; Bearings: ABEC 7; Spacers: Aluminum; Axles: Zero Clearance; Rocker Washers: Aluminum; Stopper: Supplied with Brake