The Storm Max fins have a bungee strap made for all dive conditions. Each fin has a hole in the blade for easy transport and storage. Produced using Thermoplastic Vulcanisate (TPV) compound Monprene, a single material construction, gives both durability and strength. TPV isa form of rubber which has been vulcanized during the compounding process. This means that the polymers are converted into more durable materials through the introduction of crosslinks. Open heel innovative foot pocket design can accommodate a boot. Ergonomic foot pocket ensures comfort and prevents fatigue. Silicone bungee strap equipped for easy on-and-off. Strong blade aids in efficient power transfer.