Oceanic Viper Open Heel FinsSo fast and responsive they're scaryPrecision blend of hydrodynamics and materials technology for ultimate comfort, efficiency and performance. The Viper's Flexible Power Thrust Channel directs water off the tip of the blade for improved power and efficiency. The engineered channels and side rails direct water flow off the tips of the fin without allowing water to "spill" from the sides of the blade for uncompromising power and efficiency.FEATURESAvailable in as many as SEVEN sizes and FIVE colorsIdeal for all diving and snorkeling skill levelsFlexible Power Thrust Channel directs water off the tip of the blade for improved power and efficiencyPower Vents reduce stress while accelerating water over the bladeOversized blade produces increased thrust and propulsionGenerous yet streamlined foot pocket fits a wide range of boot styles while significantly reducing dragExtremely lightweight for increased performance and ease of travelOpen Heel features easy adjust quick-release buckles