These fins have been specifically designed for training and to build up muscles, but they can also be profitably used for snorkelling and swimming, where the small size of the blade makes it easier to enter and come out of the water.The short blade is made from highly reactive and light materials to guarantee agile and not very tiring, but still effective kicking.The length of the blade and the materials used have been studied to enable ideal muscle training, without ever causing painful cramps.The small size of the blade makes it easier to enter and come out of the water. The foot pocket features the original self adjusting foot pocket system, which thanks to the special softness and elasticity of the blends makes for a consistently soft and adherent fit.