The fins Seac Propulsion S; very high performance; created in technological material; impact and stress resistant; tough at low temperatures; anallergic. The fin Seac Propulsion provides at the same time great softness and flexibility. Designed for dives at more rigid temperatures but well-suited to any kind dives and level of divers. The innovative features introduced; such as as the blade having the conveyors along the entire fin; to prevent lateral water dispersion and provide greater propulsion with reduced muscular effort. The water is directed toward the tip of the flipper giving a greater thrust propulsion with minimal muscular fatigue and minimal energy expenditure;increasing safety when dealing with more critical situations such as strong current or when carrying heavy equipment. The ribbing and the is in thermoplastic rubber of superior quality; as well as the anatomical foot pocket integrated with the flipper blade for greater thrust; reduce fatigue and ankle twisting. The Sling straps in color-coordinated with the blade is developed to provide the diver with a quick and comfortable fit. Seac Propulsion S fin is entirely designed and manufactured in Italy by Seacsub SpA; a bench mark for manufacturers in the diving industry since 1971