IqushionFrom the top, they look like your typical flip flops. Underneath, theyre engineered with FitFlop's iQushion air foam cushioning, with impact pillows at high pressure areas, for non stop comfort. Flip flop Soft jelly upper Micro bubble foam ergonomic footbed Built in arch contour Slip resistant soles Materials Upper: synthetic Outsole: rubber Size Guide Fits true to size. We recommend taking your normal size. For additional size information, please