They also reduce vibrations caused by moving the fins underwater.
HYDRO fins have rubberised side reinforcements, increasing the elasticity of the feathers, prolonging the life and affecting the stability of the fins.Holes on the sides of the fins reduce stress on the fins during acceleration. The appropriately shaped centre of the HYDRO fins' feathers and the two channels made of elastic material create a tunnel that directs the flow of water along the fins, increasing thrust, swimming speed and reducing leg fatigue.