Center-mount Design: Relax in the water in order to focus on stroke and improve techniquenOne-way Purge Valve: Allows for clear and easy breathingnHydrodynamic Design: Worn with swim goggles, promotes proper head and body positionnFront Positioning: Swim at slower speeds with perfect stabilitynAll Four Swim Strokes: Stays in place for all competitive strokes, including flip turnsn