Footwear with dynamic arch system

An article of footwear comprising an upper and an elastic sole structure secured to the upper having a front at the toe area and a back at the heel area, a medial side and a lateral side, a longitudinal length from the front to the back and a transverse width from the medial side to the lateral side, the sole structure comprising:

• an outsole comprising an underside for contact with the ground having a generally convex shape along the longitudinal length of said footwear when in a non-weight bearing position;
• said outsole having an underside for contact with the ground, said outsole comprising a front end section and a back end section, said front end section located along the entire front sole region of said sole with a connecting portion in the front of the midfoot sole region, said back end section located along the entire rear sole region of said sole with a connecting portion in the back of the midfoot sole region;
• wherein said underside of said front end section of said outsole is curved upward toward the upper from the innermost portion in the midfoot sole region to the front of the footwear;
• wherein said underside of said back end section of said outsole is curved upward toward the upper from the innermost portion in the midfoot sole region to the back of the footwear;
• wherein said underside of said outsole has a place of contact at the innermost portion of the front end section of said outsole and a place of contact at the innermost portion of the back end section of said outsole;
• said underside of said outsole further comprising a raised portion above the underside of the outsole's places of contact, said raised portion located between the front end section and the back end section in the midfoot sole region;
• wherein when said footwear is worn and weight is placed down onto said outsole, said front end section and said back end section of said outsole each bend about said places of contact, said front end section and said back end section rotating in opposite directions causing the underside of said outsole of the footwear to flatten in the forefoot sole region and the rear sole region.