From the top, they look like your typical surfer-dude flip-flops. Underneath, they're engineered with FitFlop s iQushion air-foam tech, with impact pillows at high pressure areas, for non-stop comfort. Throw a pair in your suitcase - they're just the thing for beach treks, bar hops, pretty much any holiday activity. Upper - Other Materials, Lining and Sock - Other Materials, Sole - Other Materials.