Description: Modern, comfortable, flexible callosha fins designed for snorkelling and recreational diving. 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. In order to minimise the load exerted on the diver's feet, the soles of the HYDRO fins are suitably reinforced and the presence of holes in the front of the wellingtons means that sand and stones do not irritate the feet and can flow freely, along with the water, out of the wellingtons. HYDRO fins have rubberised side reinforcements, increasing the elasticity of the feathers, prolonging the life and affecting the stability of the fins. They also reduce vibrations caused by moving the fins underwater. 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. To improve performance, the HYDRO fin feathers are inclined at a 20-degree angle to the calliope. HYDRO fins are an excellent choice for those who want the perfect compromise between swimming speed and leg fatigue.