Built without the constraints of world race regulations, the adidas Adizero Prime X 2 Strung offers pinnacle technology, incredible energy return, and enhanced efficiency for your very best races. The shoe utilizes a huge stack of Lightstrike Pro foam for lightweight, responsive cushioning and energy return. Sandwiched within, dual carbon infused plates guide your feet through the transition and offer a pop of energy that can help tired legs make the most of long races. The STRUNG upper allows adidas to build support layer by layer, with expansion zones throughout the forefoot and a locked-in fit through the midfoot and heel. The knitted tongue construction enhances comfort. Underfoot, a new, even lighter Continental rubber outsole ensures traction in the dry and wet alike, offering smooth, flexible traction. This powerhouse shoe breaks all the rules, giving you the advantage over other starters and driving you to new heights. Weight: 315g, Stack height: 50mm, Offset: 6.5mm. Regular fit, lace closure. Features STRUNG upper, textile lining, Lightstrike Pro cushioning, dual carbon-infused plates, and Continental rubber outsole.