This is the Mares Full Foot Avanti Super Channel Scuba Diving Fins Snorkeling Fin Features: Brand new & completely redesigned New blade design with a large central Superchannel and two traditional lateral channels Provides excellent thrust while maintaining hi-efficiency to reduce leg fatigue Foot pocket is molded for maximum comfort Channel Thrust Technology system for optimal water channeling Due to the compact length of the blade this is the ideal fin for travel and for dives in warm waters. The orthopedic foot pocket with variable thicknesses provides superior comfort, and the blade is constructed of Tecralene and Thermoplastic rubber for extended durability.