U.S. Divers 5 mm Comfo High-Cut Snorkeling and Diving Boot High-cut snorkeling and diving boot for protecting feet while wearing fins 5 mm neoprene upper is sturdy, comfortable, and warm in cool currents Vulcanized rubber sole with puncture-resistant layer and rubber side foxing Noncorrosive #10 zipper guarantees an easy, comfortable fit every time Available in adult sizes 5 to 13; 2-year limited warranty