Abstract: A compound structure of mid-sole and insole is disclosed. A PU outer sole is made into a trough shape in order to reduce the use of PU and thus the weight thereof. The mid-sole and insole are made as a compound of a lightweight material, such as EVA, and disposed inside the trough. The invention thus provides best comfort to the user while the total weight of shoe is effectively reduced.

Abstract: An insole with the concept of harmonic tai chi consists of an upper pad, a lower pas, and a supporter. The upper pad has an S-shaped vibration absorption block protruding downward on the outer side of the front sole. Corresponding to the vibration absorption block of the upper pad, the lower pad has an S-shaped elastic block on the inner side of the sole. With the harmonic combination of the vibration absorption and elastic blocks, the insole is more suitable to dynamical needs as the user walks. The U-shaped supporter is made of a harder material, fixed on the lower pad and extending from the inner foot arch to the heel, thereby protecting the heel and supporting the inner foot arch.

Abstract: An insole that functionally adjusts its supporting curvature according to the heel height is disclosed. A first supporting portion is disposed at the metatarsus. A second supporting portion is disposed between the front edge of the calcaneus and the back edge of the metatarsus. The bottom of the second supporting portion is formed with several grooves in the horizontal direction. The width of the grooves is inversely proportional to the heel height, thereby functionally adjusting the supporting curvature.