A shoe having a dynamic fitting and shock absorption system. Disposed within the shoe is an insert defined by a sensing means including a U-shaped pivot bar that straddles a movable footbed. The bar has an upper end attached to a strap extending over the instep and forefoot. The opposite end of the strap...http://www.google.fr/patents/US4924605?utm_source=gb-gplus-shareBrevet US4924605 - Shoe dynamic fitting and shock absorbtion system
