Four Seasons Contour Cushion Replacement Insoles are great, economically priced replacement insoles that have a thin fit with mild anatomical contours and provide superior cushioning and comfort. Four Seasons Contour Cushion Replacement Insoles are designed to replace the flimsy insoles that manufacturers typically include with the shoes you purchase. Four Seasons Contour Cushion Replacement Insoles are made from a closed cell polyurethane foam that is much more durable and much more shock absorbent than the standard EVA (Ethylene Vinyl Acetate) foam insoles found in most store bought shoes. Also, since the Four Seasons cushion replacement insoles are made from a closed cell foam they are non porous and can be hand washed and air dried as often as needed.