SOLE (FOR SHOES) MANUFACTURED WITH A MOLD HAVING DENSE FLEXIBLE PROMINENCES PERFORATED AND EMPTY IN THE INNER PART

摘要

This invention comprises a sole, which is made through the use of a mould and of suitable material, the upper part of which possesses a plethora of soft and flexible protrusions empty inside and full of holes, which when depressed act as many small pumps that absorb air on expansion and release air on contraction.