Land or sea, this shoe will keep up with you stride-for-stride!; Upper is made from a blend of synthetic leather and textile materials for an easy and functional fit. Hook and loop adjustable strap secures the foot in place. Removable insole. Compression molded EVA midsole works to lessen the forces of impact. Full-length Receptor Technology mirrors the foot s sensory nerve-ending cells and supports the natural movement of the foot, improving strength and stability, while minimizing fatigue and maximizing performance. Ideal for negotiating land or water. Natural rubber outsole affords traction and durability.