on FitFlop's ultra-light, ergonomically designed iQushion midsoles for all-day comfort made of airy foam, with impact pillows for extra cushioning at the heel and forefoot biomechanically engineered, supercomfortable sandals adjustable quick-stick fastening for a great fit around instep padded, leather-lined uppers with seamless built-in arch contour and treaded rubber outsole, lab-tested for slip resistance