HydroTread rubber outsole for water dispersion & maximum traction. Featuring 360? Ventilation for maximum breathability. Soft, lightweight mesh. Stitched EVA insole. Adjustable strap for optimal fit. When it comes to shoes and water, it's all about movement-the soles and shoe construction that keeps you moving comfortably and a design that lets the water move in and out with ease. Nobody puts more thought and design into water shoe technology than Speedo. So whether you're on a beach, boat or dock, you need the world's most evolved water footwear.