The Salvimar Speeder Fin is a must-have for any avid spearfisher or apnea enthusiast. Its innovative design and features make it a top choice for those seeking the perfect underwater companion. The fin is composed of a comfortable and ergonomic rubber sock with an incorporated sole, ensuring optimum comfort during long expeditions. The rigid PP sole, embedded in the molding, enhances the fin's durability and provides stability while navigating the depths. The PP side clips, cast on the spars, further contribute to the fin's secure fit and efficient movement through the water. Made from polypropylene, the molding of the blade ensures superior performance. With differentiated thickness, the blade provides the best propulsion force and elastic return, minimizing swimming effort. The heel is 3.5mm thick, while the toe measures 1.8mm, enhancing flexibility and agility. Additionally, special sills under the arch of the foot offer extra support and comfort. Experience the ultimate swimming experience with the Salvimar Speeder Fin's exceptional Blade design, allowing you to effortlessly explore the underwater world while conserving energy. Salvimar Speeder Fin Fin for Spearfishing or apnea composed by a Socks with incorporated sole and Blade removable: Socks Ergonomic rubber with differentiated thickness for optimum comfort Rigid PP sole embedded in the molding The PP side clips are cast on the spars Blade in polypropylene with differentiated thickness, made by molding The heel is 3.5mm thick while the toe is 1.8mm thick Sills under the arch of the foot The Blade is realized by molding, with differentiated thickness in polypropylene to guarantee the best propulsion force and a perfect elastic return in order to minimize the swimming effort, the Blade has been designed with differentiated thickness