Season: Year-round itemsType/Intended use: RaceSole: DuPont Zytel nylon, 25% stiffer than traditional nylon soles of the same weightClosure system: Velcro fastening for perfect fit and optimal power transmission, dual velcro fastening, displaced D-ring eyelets of upper velcro fastening improves the pressure distribution and eliminates pressure pointsMaterial: high quality and breathable microfibreproduct specific size information: Normal CutAdditional Information:preformed EVA with middle arch support and anti-bacterial fabricSuper Natural X-Static Footbed Kit with arch support