Angled cut fins are a play on the Dolphin cut. With an angled blade you don't get the flex in the tip of your blade like a dolphin cut fin . This generates more power when you kick.Like the Dolphin cut they will generally use a dual rubber compound , softer in the foot pocket area and stiffer in blade. Not all fins will have the same foot pocket and sizing can differ from brand to brand. It is best to try them on and we recommend to use fin savers which keep your fins attached to your feet.