Ergonomically engineered to help optimize your body's alignment, natural movement and energy; iQushion midsole made of high-rebound EVA air-foam that retains its cushioning, with front-and-back impact pillows; Super-Q version uses innovative injection-molded foam for extreme flexibility, lightness, cushion & bounce; Anatomically contoured footbed diffuses pressure and gives natural arch support; Standard width fit - if you are between sizes, we recommend you size up on this style; Grip level 1 - everyday use/road tread; Upper has soft padding at the heel