The Avanti Quattro + non-vented fin exceeds the established performance of the traditional model thanks to the use of composite materials Tecralene, Thermoplastic Rubber that optimize efficiency. The Avanti Quattro + provide greater responsiveness and thrusting power with an even more attractive look. New bungee straps are provided as standard issue. Straps are equipped with large grasp-loops for easy donning and doffing. Proven Channel Thrust Technology makes the fin versatile and ideal in all diving conditions. The stabilizers improve stability and eliminating ankle twisting phenomena. The anatomical foot pocket conveys more power to the blade. Mares design is inspired by marine mammals. Channel thrust technology maximizes the channeling of water and moves a much greater amount of water compared to other fins of the same size. The result is greater thrusting power with the same amount of effort. Fin is available in multiple sizes and colors. The regular size fin blade measures 15" (38cm), weighs 32 oz. (907 g) and has a blade surface area of 120.9 cubic inches (780 cubic centimeters).