Vipers' have a soft neoprene padding glued into the inside top of the fin. This not only pads the top of your foot, but also helps to prevent blisters. The blade of the fin is symmetric. They do NOT float, and offer both short and long blade styles. The Viper's strength does not come from being rigid and stiff. It comes from the blade's patented design which produces torque (an increasing resistance to flex) and "snap" to the blade (memory). These actions channel the water between the vertical side rails and off the straight blade tip for a directed thrust. This produces the most efficient kick possible.
Designed to be an all purpose fin for both bodyboarding and bodysurfing. It has a five inch blade with the vertical side rails slanted down to a narrows tip. This slim profiled VIPER is very lightweight and has excellent acceleration, maneuverability, tracking, and burst speed. It uses shorter, quicker kicks. Has a yellow splash on the blade.