A masterpiece. (And likely the style responsible for widespread FitFlop fanaticism.) Clean lines, minimalist mod, sports-styled construction, our WALKSTAR 3 is that "goes with anything you"ve got on" sandal that you"re always happy you"ve got. Now in a variety of materials (bright patents, cracking metallics and neutral nubuck/leather). With our biomechanically engineered Microwobbleboard midsole.Microwobbleboard technology FitFlop footwear is built with patent-pending, biomechanically engineered Microwobbleboard midsoles. Originally designed to activate leg muscles more, studies show they also offer excellent shock absorption and instant relief from underfoot pressure.