Promate Binar Blade Scuba Dive Fins - FN429*Efficient, fast and for easy kicking. The Binar Blade fins use two materials in the blade, directing the water flow for maximum kicking efficiency. The innovative open heel fins, with dual channels, are for optimizing water flow. A unique design that allows water exiting located in front of the foot pocket by eliminating resistance during fining. *EVA fins blade, TPR foot pocket, TPR channels convey greater power with reduced effort, Patented quick