Patent ID: 7152343
Filing Date: 2006-12-26
Classification: A43B

Abstract:
1. A footwear system comprising: a midsole having a first cavity and a second cavity; an outsole having a ground contacting surface, said outsole having a third cavity and a fourth cavity, said outsole being connected to said midsole so that said first cavity is complementary to said third cavity to define a first air bulge and said second cavity is complementary to said fourth cavity to define a second air bulge, said first air bulge and said second air bulge extending outward from said ground contacting surface, said first air bulge being connected to said second air bulge by a passageway; a first resilient insert disposed in said first cavity and a second resilient insert disposed in said second cavity, said first and second resilient inserts providing an energy absorption to said midsole upon impact, wherein said first resilient insert and said second resilient insert each has a tread, said tread contacting an inner surface of said outsole upon impact to provide traction to said midsole, said inner surface being opposite said ground contacting surface, wherein said tread is a plurality of longitudinal grooves extending on a first surface opposite said midsole.