Aeris Mako Open Heel Fin (Neon Yellow, Reg (10/12)) Precision Blend of Ergonomics, Hydrodynamics and Materials Technology Flexible Center Channel Accelerates Water Over Blade for Improved Efficiency High Performance Vents Reduce Stress Oversized Blade Produces Increased Thrust and Propulsion Generous, Yet Streamlined Foot Pocket Significantly Reducing Drag