Open Box Oceanic Viper 2 OH FinOpen Box Oceanic Viper 2 OH Fin delivers fast, responsive performance for scuba and diving. A precise blend of hydrodynamics and materials technology supports comfort, efficiency and power. Engineered channels and side rails direct water flow off the tips of the fin, preventing water from spilling along the blade and delivering uncompromising thrust. With an oversized blade and a flexible Power Thrust Channel, this fin increases thrust and efficiency.