The Powerfin in lime green from Arena is a swim training fin that will propel you through the water and creates drag to give your lower body a good workout and improves your swim kick. This Arena Powerfin has a soft foot pocket with enclosed heel and open toe to release water when you need to take them off. The heavier weight and stiff blade of these swim fins will increase the water resistance they create to give you a more intensive workout in the pool.
A little stiffer than standard training fins, so an excellent choice for a swimmer who already has a fairly powerful kick. And they really are lime green, which was a major bonus for my son.