They also reduce vibrations caused by moving the fins underwater.
Perfectly fitting to the bare foot, the HYDRO fins are very easy to put on and take off thanks to the grips on the callos. HYDRO fins have rubberised side reinforcements, increasing the elasticity of the feathers, prolonging the life and affecting the stability of the fins. To improve performance, the HYDRO fin feathers are inclined at a 20-degree angle to the calliope.Holes on the sides of the fins reduce stress on the fins during acceleration.