Say hello to supreme energy return. adidas remade our high-energy running shoes with a 360º fit improvement to support female runners. The Ultraboost 22 has a narrower heel fit and lower instep curve to reduce heel slippage and help avoid blisters, plus the medial outsole pattern has been refined for a smoother ride. Throw in the foot-hugging adidas PRIMEKNIT and incredible energy return of BOOST, and you get an ultra-comfortable shoe for any distance. - Regular fit - Lace closure - Primeknit - Stable, supportive feel - Textile lining - Boost midsole - Midsole drop: 8 mm (heel: 21 mm / forefoot: 13 mm) - Rubber outsole - Yarn in upper contains at least 50% Parley Ocean Plastic and 50% recycled polyester Shipped by adidas