Patented double layer system: top layer of soft cushioning foam provides long-lasting comfort. Bottom layers of shock absorbing foam bounces back time after time. Bottom layer of Sure Grip Foam® stays in place, provides less wrinkling and bunching. Cooling vents keep feet cool, dry and comfortable. Excellent shoe fit. Feel the Difference Immediately. Fits in Virtually Any Shoe. Cooling Vents Help Keep Feet Dry Men's or Women's. Men's Sizes 7–13, Women's Sizes 5–10 Guaranteed Comfort