The Mares Volo Race Fins offer all the great qualities of the Volo Power in a full foot fin design. Increased efficiency with minimum effort! The Mares Volo Race Fins is one of the most advanced fins on the market. With the Optimized Pivoting Blade (OPB) that Allows the blade to maintain an optimal angle throughout the kicking cycle, whereas traditional fins achieve this only during a small portion of the cycle. OPB produces a constant thrust, which minimizes fatigue and produces fluid movement through the water. The Mares Race Fins also use soft longitudinal inserts allowing a controlled deformation of the fin blade while kicking. This channel shape moves a greater amount of water resulting in more thrust for the same effort. The Mares Volo Race Fins use an anatomical foot pocket to better fit each individual and allow for enhanced comfort.