NP Infinity Pro Stand Up Paddle Concave blade tip design achieves a sharper water catch; The unique design allows for a lightweight blade while keeping strength and stiffness Pulling face: Double concave into V-dihedral provides added power and stability in each stroke; A power zone consisting of a unique 3-C shape (concave-convex-concave) ensures more propulsion with each Reverse face: Rounded edges reduce airflow and provide optimum paddle control through each phase of the swing; Generally matched to medium shaft stiffness's; Concave center reduces volume allowing for a sharper water catch and less drag