The Mares Avanti X3 fin offers exceptional value and out performs many other fins. Optimising the thrust angle provided by 3 channel avanti system, this thermoplastic and rubber fin reduces the risk of cramping, and with its special ABS buckle makes fitting foolproof and easy. Superb quality fins at an exceptional price. The perfect combination of comfort, convenience and power. The mid-sized Tecralene blade has three channels to optimize the flow of water. Upper and lower stabilizers help maximize muscle energy conversion. The straps feature the ABS system for one-handed adjustment.