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 and bounce; Anatomically contoured footbed diffuses pressure and gives natural arch support; Average width fit, this style fits true to size; Grip suited to everyday use/road tread; Upper has soft padding at the heel; Footbed lining and laces - 100% recycled PET polyester; Pull-tab webbing - 100% recycled nylon