Marathon Race Skate Hand-Made In Italy - Designed for speed with hand-made custom fit and premium components; Heat-Moldable Carbon Boot - Custom, anatomical fit that increases power transfer and response; 45deg Micro-Adjustable Buckles - Micro buckles and performance lacing ensure secure fit; 3WD Extruded Aluminum Frame - 320mm/12.6" laterally adjustable frame engineered to support the 3x125mm wheels, increasing speed and maneuverability; Elite-Performance Hydrogen Wheels - 125mm/85A wheels are made in USA with proprietary urethane formula for ultimate performance, less vibration and reduced wear; Twincam ILQ-9 Classic Plus bearings maximize speed