The fixed blades of the Stingray fins are characterized by their thermo rubber foot-pocket and for the angle between foot-pocket and blade being 22 degrees (compared to traditional 15/17 degree). The use of thermo rubber of two different stiffness compounds increases comfort over normal foot-pockets. The 22-degree angle is the result of trying to optimize the power of the push through the water, relative to effort. The blades are produced in a low modular polypropylene in two degrees of stiffness: Winter Gray (softer) and Black (medium hardness).
2 stiffnesses: Winter Gray (soft) and Black (medium)
22-degree blade angle