These premium insoles provide contoured, flexible support that cradles your feet with targeted cushioning that improves your athletic performance and prolongs the life of your shoes. Ideal for walking, running, training and sports. Ideal for a medium to high arch foot type. Lightweight Polysorb� polyurethane foam heel cupping and contoured arch support. SpenCore� forefoot cushioning. SpenCore� heel strike pad. Low-friction top cloth helps prevent blisters. Silpure antimicrobial top cloth reduces odor. *Recipient of the American Podiatric Medical Association Seal of Acceptance, which recognizes products that have been found beneficial to foot health, and of significant value when used in a consistently applied program of daily foot care and regular professional treatment.