Made of highly flexible material and TUSA Flex blade material. Even if you are not confident in your leg, you can create stable propulsion. Recommended for snorkelers who want to swim long distances with light force on the water; Plastic fins of the World Winner of the Good Design Department Award for the Good Design Department Award; Size compatible (boot size) SF-5000 (regular size): 9.4 - 11.0 inches (24 - 28 cm); External dimensions: 23.8 x 8.9 inches (5 inches (5 inches (5 inches (5 inches (5 mm).