Level Six Neoprene River Boot 2.0 - Men's Black 5 US. 0 features a vulcanized rubber sole and toe cap along with 2.5mm neoprene for warmth and comfort. The velcro strap and bungee-collared top allow you to adjust the fit easily and makes putting the boot on and taking it off a simple task even when wet. Specifications for Level Six Neoprene River Boot 2.0 - Men's: Manufacturer: Level Six Gender: Male Color: Black Footwear Type: Boots Activity: Swimming Footwear Upper Fabric/Material: Neoprene Package Contents: Level Six Neoprene River Boot 2.0 - Men's Level Six GMA-RBOO2-BK-5: Neoprene River Boot 2.0 - Men's Black 5 US