This patent was just granted: Midsole structure for a sports shoe and sports shoe Quote: The invention relates to a sport shoe and particularly to its midsole construction. The midsole construction comprises a flexible body element, which extends essentially over the entire length of the sole of the foot, a flexible heel element located under the body element, which extends from under the calcaneus at least partly into the area of the cuboid bone, and a plate-like stiffener element located at least partly between the body element and the heel element. According to the invention, the stiffener element extends from the heel area forwards farther on the lateral side of the sole of the foot than on the medial side of the sole of the foot
Read this article:
Patent for running shoe midsole for more natural and economical stride