Almost three decades ago, the original Össur running feet were modeled after the hind leg of a cheetah. Today, with breakthrough technologies in materials, design and engineering we’ve developed a simply-shaped blade that stores energy and uses it to propel the runner forward.

No bionics.  No electronics.  No magnetics.  It’s physics.  When the runner's foot hits the ground, the blade compresses and stores potential energy. Then it rebounds to push the runner forward using 90% of the energy generated by a runner's stride. This enables an athlete to push harder and go a little further.