Be ready for race day with the adidas Adizero Prime X 2 Strung. Built using the latest technology and without the constrictions of world race regulations, this shoe gives you everything you need in a race shoe. Chase your fastest moments in comfort with not only one but two carbon plates to give you plenty of propulsion and energy return to make it to the finish line in record time. Details Upper: STRUNG upper is cutting-edge technology that is layered to give you strength in the midfoot and heel while giving you flexibility in key expansion zones in the forefoot. A knitted tongue enhances the locked-in feel. Midsole: Three layers of Lightstrike Pro cushioning is more than any other adidas shoe to create a high stack of responsive cushioning underfoot. An energy core between two of the foam layers helps reduce weight and adds more spring to the forefoot and midfoot. The cushioning is framed by two carbon plates to create even more responsiveness and keep you at your fastest. Outsole: Continental™ Rubber outsole gives you serious grip to race around corners and turns on the roads.