1This insole can prevent forefoot external rotation and heel valgus, improve flat feet and unstable walking problems. 2The heel cushioning sheet has high density, fine and uniform structure, and excellent resistance to compression and deformation. 3Meet the threepoint mechanical balances of the arch, balancing the inner and outer arches when walking. 4The three-point mechanics promotes the foot structure to be in a stable and neutral state, preventing the feet from being damaged. 5The Ushaped heel can fix the neutral heel position, wrap around the heel, prevent the heel deviation and slip, and play a better corrective role. 6Both sides are heightened to effectively protect the foot joints, guaranteed during exercise.