The perfect play sandal for kids and their everyday adventures! Totally waterproof. Incredibly durable. And, of course, wildly comfortable. The BIRKENSTOCK Mogami features a waterproof synthetic Birko-Flor upper, hook and loop straps and a contoured PU footbed for Birkenstock comfort and support.Anatomically shaped footbedFootbed lining: polyurethane Sole: polyurethane A7