The revolutionary design of adidas Pureboost X running shoes allows the upper to move with the foot to enhance the fit around the arch. That floating arch helps empower each step with a snug fit and nonrestrictive support. boost™ in the midsole returns your energy as the flexible outsole ensures a smooth ride. These shoes will definitely turn heads with the pioneering look.Upper: Unique upper materials allow for a terrific fit and great performance by allowing for stretch while supporting the foot. Innovative lacing system removes the need for many lace holes, eliminating pressure on the top of the foot.Midsole: boost™ midsole provides unmatched energy-return and superior cushioning. Outsole: A simple version of the Stretchweb outsole provides enhanced cushioning and smooth transitions.