Used Mares Avanti Superchannel Open Heel Dive FinThe Mares Avanti Superchannel Open Heel Dive Fin is designed for scuba and diving, with a blade length that varies from 35 to 37 cm depending on size. It features an open foot pocket and a three rib design that allows the blade to arch during the fin stroke, while water is channelled in the opposite direction of motion to minimize thrust loss. Built for durability and reliable performance in diving gear, this fin uses Thermoplastic rubber Tecralene