This invention relates generally to footwear such as a shoe, including an athletic shoe, with a shoe sole, including at least one removable midsole section formed by a midsole portion, wherein the removable midsole section is non-orthotic. The removable midsole section is inserted within the shoe upper,...http://www.google.es/patents/US7562468?utm_source=gb-gplus-sharePatente US7562468 - Removable rounded midsole structures and chambers with computer processor-controlled variable pressure
Removable rounded midsole structures and chambers with computer processor ...
