The Mares Avanti Superchannel OH diving fins are ideal for the diver seeking the perfect combination of power and efficiency, while minimising leg fatigue. The Avanti Superchannel OH diving fins have a blade length that varies from 35 to 37 cm depending on the size. The fins have an open foot pocket. The three rib design allows the fins to arch during the fin stroke. The water is then channelled in the opposite direction of motion, minimising loss at the side edges of the fin. Muscle power is thus transformed into propulsive thrust.