The Deep See 3/5 mm Aqua Purge Boot is a great choice for Diving, Snorkeling, Watercrafts, or Beachcombing. The boot is made from See-Flex Nylon II Neoprene with Vulcanized Rubber Soles that have a Puncture-Resistant "Safe Sole" Layer and Low Profile Grip Pads. The boot is equipped with Deep See's Unique Water Purge Heel which will eliminate the Excess-Water left in the Boot as you make your Water Exist. This unique feature will keep your Feet Warmer and make Walking on Slippery Surfaces much Safer then with Conventional Dive Boots. The Deep See 3/5 mm Aqua Purge Boot has a 3 mm Neoprene Upper with a 5 mm Neoprene Inner Sole for added Warmth and Comfort. This Pull-On Design Boot has a Two-Seam Heel that Reduces Chaffing and a Durable Toe and Heel Cap for added Strength and Durability. All the Boots Seams are Glued and Blind Stitched adding to the Boots Strength and Durability. The Aqua Purge also has an Extended Heel Grasp Tab for Easy Donning and Doffing.