Reef Rover Sandals Brown, , Upper: Synthetic nubuck, Outsole: Rubber, Swellular technology, Super soft contoured foam footbed, Molded foam midsole, High-density sawtooth rubber outsole, Superior traction, Extra padded soft textile liner , These Rover Reef sandals feature a new swellular technology that increases the comfort, support and traction of the sandals, so nice!, ,