The new Avanti Quattro + fins exceeds the established performance of the traditional model thanks to the use of new materials that optimize efficiency. Greater responsiveness and thrusting power with an even more attractive look. New Bungee Strap is provided standard. Proven Channel Thrust technology makes the fins versatile and ideal in all diving conditions. The stabilizers improve stability, eliminating ankle twisting phenomena. The anatomical foot pocket conveys more power to the blade.   When purchasing open heel fins, bear in mind that they are designed to be worn with a hard or soft soled boot, the fin pockets will not fit correctly or comfortably with bare feet (or socks).