Engineered with iQushion air-foam cushioning, with impact pillows at high pressure areas, for non-stop comfort. These sandals feature an ultra-light and flexible compressed air foam padding and impact cushions at the front and back for added comfort. Features On FitFlops 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 Built-in arch contour that hugs your feet