Oceanic Viper Open Heel FinThe Oceanic Viper Open Heel Fin uses a flexible channel built in to the blade to more effective capture and control water as it flows down the length of the blade during a kick cycle. The reinforcement bars on either side of the fin provide strength but also are shaped to prevent the water from spilling over the edge of the blade which would lower the efficiency and power output of the fin. The blade itself uses a dual material construction to create