The Scubapro Seawing Nova Gorilla Fins are a tougher harder version of the popular & groundbreaking Seawing Nova fins. The stiffer blend of monoprene increases the rigidity of the fin which means you can fin faster & move through the water faster. The Hinged Design lets the blade section of the fin adjust to each stage of the fin kick ensuring a Perfect Angle of attack at each stage increasing efficiency far beyond a traditional design. ◊ Built with a space age Monoprene® elastomer that is virtually indestructible.◊ Proprietary G4 articulated joint allows the entire blade to pivot & generate thrust.◊ Wing-shaped blade creates a near-perfect balance of stiffness & flex.◊ Variable Blade Geometry wingtips arc upwards, providing more power & increasing stability.◊ Pivot Control technology ensures that the most efficient 45-degree◊ angle of attack is maintained no matter how easy or hard you kick.◊ Marine-grade bungee strap is self-adjusting, comfortable, extremely durable, & makes easy work of donning & doffing the fin.◊ Re-engineered footplate with new co-molded Grip Pads provides enhanced non-skid grip on wet surfaces.