Avanti Superchannel FF The perfect blend of power and efficiency. Three channels for the Superchannel effect Manufactured in Tecralene for superior performance Orthopedic foot pocket Due to the compact length of the blade the 42/43 size in 37 cm (14.5in) is the ideal fin for travel and for dives in warm waters. The orthopedic foot pocket with variable thicknesses provides superior comfort. The blade is constructed of Tecralene and Thermoplastic rubber for extended durability.