This is the Riffe Descender Plastic Long Blade Fin Spearfishing Fins Features: Polypropylene Long Blade design Thermoplastic Veloc Foot Pocket 20 degree angle Lightweight and comfortable Variety of sized for the perfect fit Offers an affordable choice for your daily dives. Developed to withstand the rigors of spearfishing in rough conditions and beyond. Polypropylene long blade design stores more energy to produce a strong thrust with minimal effort. Paired with RIFFE's Veloc Foot Pocket featuring a streamlined fit, made of Thermoplastic Rubber and a 20 degree angle for the optimum power stroke. Lightweight and comfortable. Available in a variety of sizes for the perfect fit.