This is the Aqualung 3mm Caribbean Molded Sole Boot Scuba Diving Boots BootiesFeatures: Nylon and neoprene 2-color compression molded sole, built-in arch support and raised heel for comfort Two-seam pattern minimizes chafing 3mm upper with 5mm inner sole Ranging from warm to cold water conditions, Aqua Lung offers a wide array of boots for your diving adventure. With ergonomic soles, that add to your comfort and keep your feet warmer, soft to hard sole and quality materials and components, the Aqua Lung line of boots is a complete offering with innovative features only found in Aqua Lung boots. "