The All Purpose Support Medium Arch features: Upgrade the fit and feel of a wide range of footwear with long-lasting comfort for all your activities. Gives you support where you need it most, helping redistribute forces to reduce stress and strain on your entire body, not just your feet. Designed to replace the removable liner in a wide range of footwear. Medium arch orthotic support helps stabilize the foot, reducing stress on feet, ankles, knees, and back. Sculpted heel cup cradles the heel to maximize natural shock absorption. Moisturewick top cover helps reduce odors and keeps feet fresh. Stabilizer cap supports the rearfoot and provides structure and stability to the foam layer. Durable high density closed-cell foam supports the whole foot for long-lasting comfort. Doctor-recommended Superfeet shape — approved by the American Podiatric Medical Association. Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first.