Simple, casual and ready to go. These sporty-styled Surfer flip-flops feature soft textured webbing straps and a subtle embossed-rubber logo. On our supercushioned, pressure-diffusing Microwobbleboard™ midsoles. Must-haves for hot sunny days...surf’s up. Upper Material: Polyester Lining Material: Unlined Fastening: Slip-On Outsole: Slip-Resistant Rubber Technology: Microwobbleboard FOOTBED TECHNOLOGY Launched in our very first sandal in 2007, our patent-pending, triple-density Microwobbleboard midsole was engineered by two pioneering British biomechanists. Delivering extraordinary comfort, it not only helps absorb shock but can also diffuse underfoot pressure, by instantly increasing the contact area of the foot to the midsole.