The Reef XS1 is right there at the cutting edge of sandal design & technology. This awesome new flip-flop is completely water friendly with synthetic nubuck straps & a contoured EVA footbed with arch support & new drain holes. The radical midsole design incorporates an injection moulded TPU (thermal polyurethane) creating one of the lightest & most comfortable wearing experiences. You still get the durable & grippy rubber outsole with thirst quenching technology bottle opener built in. Enjoy.