Scuba Diving Fins Snorkel Extra-Wide Scuba Mask Set - SCS0086Promate Hydro Blade Scuba Dive Fins FN409 & Ocean Owl Scuba Dive Mask MK160 & Jet Semi dry Whistle Snorkel SK590: *Scuba Dive Fins: The revolutionary ridges on the blade provide stability during the kicking stroke and aid in channeling the water efficiently along the entire length of the blade. This results in a more forward thrust and greater power. Using computer aided technology; we incorporated a thermoplastic center section into the blade. This