The Riffe Descender Fins are an affordable choice for your daily dives. These Riffe fins are developed to withstand the rigors of spearfishing in rough conditions and beyond. Whether you are having to walk through rocks or hit them against a reef, these fins will prevail. IF you ever give these Riffe fins enough beating you can replacement the blade. The polypropylene long blade design stores more energy to produce a strong thrust with minimal effort. The Riffe Descender Fins are 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. These are lightweight and comfortable and come in a variety of sizes for the perfect fit.