GRID MIDSOLE INSERT

摘要

A midsole insert (100) for use with a shoe is provided. The midsole insert includes a heel portion (150), a midfoot portion (160), and a forefoot portion (170), and a plurality of grid systems located on the midsole insert, where each grid system includes a plurality of openings cut into the midsole insert forming a lattice pattern. The plurality of grids may be located on at least one of the heel portion (156), the midfoot portion (166), and the forefoot portion (176), constructed to provide energy return features. The midsole may further be constructed and arranged to attach directly to an upper during a manufacturing step, to secure the shape of the upper on a last. The midsole insert may be formed of at least two materials (110, 120) having different hardnesses, such that the heel portion has a greater hardness than the forefoot portion.