Adidas Throwstar Allround Throwing Shoe Synthetic Upper - Secures the foot firmly in place during each phase of any specific rotational or glide throwing event. Hook-and-Loop Closure - Offers additional support and security that can be dictated by the wearer. Soft Collar - Significantly reduces the pressure exerted across the Achilles tendon and ankle throughout certain phases. EVA Insole - Delivers superb cushioning and shockwave attenuation. Carbon Rubber Outsole - Delivers a robust, stable platform that anchors the athlete superbly whilst allowing their foot to glide or spin over the track surface with considerable ease.