Size: ML (9-10)Colour: Orange/Grey What makes these short fins the world’s best training fins are their unique innovative patented features. They produce even thrust in both directions of kick. The PATENTED V channel edge creates a ‘grip’ on the water, maximises kick drill results and emphasises development of neuromuscular memory. The centre of effort remains at the foot ensuring the dynamic of the kick is not changed during training. Great value for a technical product and these training fins are built to last.