Pure Boost X ShoesThese adidas by Stella McCartney Pure Boost X shoes give an outrageously comfortable fit to all foot types. The adidas Primeknit upper incorporates a free-floating arch support under the midfoot for support and a smooth feel.boost™'s energy-returning properties keep every step charged with an endless supply of light, fast energyadidas Primeknit is carefully engineered to naturally expand with your foot while you run to give you a more comfortable fit and help reduce irritationUnique strap lacing system; Synthetic sidewall panels for added stabilitySock constructionWelded overlays for support and stability; Adaptive dynamic fit for optimal flexibilitySTRETCHWEB rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of boost™ from touchdown to push-offImported