Force Fin has been designing fins for over 35 years, and with millions of satisfied customers, they can honestly say that they are the experts in fin design. Force Fins take advantage of the laws of nature and physics – and common sense. Force Fins are extremely efficient because they understand the hydrodynamic advantages of flapping foils, thrust-producing vortex, lift forces, and material rebound, and they have include these state-of-the-art concepts into every fin they design. Force Fin has been tested in Boeing’s wind tunnel and shown to have wingtips that form a perfect hydrofoil, offering turbulent free water flow. Each fin is individually handcrafted in the USA and manufactured from exclusive versions of polyurethane that are resistant to ultraviolet radiation, abrasion, and chemicals. Force Fins will last for years, even when worn daily.