The Aqua Lung Stratos 3 passed the most extreme stress and anti-shock laboratory test. The best all-around full foot fins for diving. With the power for scuba diving and the sleek lines of a snorkeling fin, the Stratos 3 is an excellent choice for warm water.Torsion Energy Point, Constructed of a 3-materials by side rib area that helps the blade flexing. The bending point has been moved backward, allowing more powerful kick with less efforts. Ergonomic Foot Pocket - design and reinforced soft material allow a great comfort. The fin has to be worn bare foot or with sock.Grip effect special finishing inside the foot pocket ensures high stability. Blade made of strong and elastic technopolimers. 4 channel structure for a better water canalization along the blade. Side wings enhance swim performance and stability.Rubber side ribs in customized Aqua Lung compounds very elastic, robust, resilient, anti-scratch. Stretched right up to the heel lower sole, more comfortable to prevent cramps. Anti-slip rubber pads improve stability on slippery floor.