A shoe containing a plurality of pairs of ribs provided between the mid-sole and the outer sole. All of the ribs are provided with at least one bowed or convex surface running the length of the rib. When weight is placed upon the sole, each of the ribs initially begins to deflect until adjacent ribs...http://www.google.com.au/patents/US4754559?utm_source=gb-gplus-sharePatent US4754559 - Shoe with midsole including deflection inhibiting inserts
