AQUA SPEED Unisex's Snorkel Flippers Hydro Pattern 18
To improve performance, the HYDRO fin feathers are inclined at a 20-degree angle to the calliope. 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. 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.