This is the Mares 5mmTrilastic Scuba Diving Hard Sold Dive Booties Boot Features: Robust Dive Boot Design Comfortable Hard Sole: Engineered to Give Highest Control & Power Transmission to Fining Ankle Area: Super-Elastic Triassic Neoprene Material Durable Nylon 2 Neoprene Design Hard Rubber Sure Grip Sole Front & Heel Reinforced w/Vulcanized Rubber: Protects High Wear Area Fin Strap Lug: Keeps Fin Straps from Shifting Strong and Durable Zipper Entry Zipper Dam: Prevents Water Seepage for Warmer Dive Seams Glued & Sewn for Strength and Durability Boot Top Edge: Taped & Sewn The Mares Trilastic 5mm Dive Boot is a robust temperate water boot that will give you years of reliable service. This beefy built dive boot has a comfortable hard sole, engineered to give the highest control and power transmission during fining action. The neoprene around the ankle area is made from a super-elastic material. The lower section of the boots neoprene is standard, ensuring warmth and adherence. The entire boots neoprene is durable nylon 2 material and the boot has a hard rubber sure grip sole.