ArchFlexSystem Adult Upgrade Replacement Insole, High Red, 9

ArchFlexSystem footbeds strengthen the natural shock absorption and stability mechanisms of the foot by giving flexible support to the arch without locking their movement. Patented 5 part construction includes double ridge thermal plastic urethane heel cassette to provide trampoline effect at heelstike, supportive but flexible polyethylene body, firm full length ethylene vinyl acetate, perforated and channeled for air circulation, Poliyou foam layer for cushion and conformity as it takes the shape of your foot for semi-custom fit and low friction antibacterial top layer lining.