This monofin is for the freediver who like open heel foot-pockets and the angle in the front of the blade. Angle decreases the amplitude of the stroke, saving the energy by this way, in the same time it increases the forward power. Monofin Dolphin Colored is made of fiberglass: hand-laminated mixture of resins, processed in moulds under vacuum. The blades stiffness and characteristics have been developed and improved with experience from earlier products. Monofin is very lightweight! Measures are 73 cm x 72 cm (width x lenght) Blade lenght depends on the foot-pocket size. For additional protection the top of the blade is equipped with a fiberglass stripe.