Double-density elastic insert element for an outsole

Abstract

A double-density elastic insert element is composed of an inner section and an outer section enclosing the inner section. The inner section and the outer section have different density, hardness and elasticity characteristics. Preferably, the inner section and the outer section are both made of polyurethane or ethylvinyl acetate (EVA) that is solidified at different molding conditions to obtain different density, hardness and elasticity characteristics. By varying the densities of the elastic insert element, the elastic insert element can be selectively modified to have more functional capabilities to satisfy different requirements.

Dependencies are inferred from the claim text.