Copper Joe products have the highest copper content, Guaranteed! Rather than spraying fabrics with copper, we infuse it directly into the nylon fibers. Our products are constructed with 85% copper-infused nylon. This innovative approach provides maximum benefits, extending the life of the product for a superior experience. Improve Your Mobility With The Fast Pain Relief You Need – Our Copper infused compression foot sleeves provide instant relief to your arch and heel through compression support that provides the maximum boost to your blood circulation. Better oxygen circulation helps reduce lactic acid build up and aids muscle recovery in ankle and feet, including your heel and arch. Why let yourself suffer any longer? Walk freely with our compression foot sleeves and perform physical activity pain free again! The Best Fit And Comfort, Ideal For Daily Wear – Available in 3 different sizes to ensure you receive the focused support that you need. Wear with sandals, shoes, boot with insoles, slippers, and under any socks. Designed with lightweight, durable, and breathable fabric – especially great if you are on your feet for long periods of time.