Copper Joe products have the greatest concentration of copper, we guarantee it! Our braces are fabricated out of 85% copper-infused nylon! Unlike our competition, we infuse the copper directly into the nylon fibers. This groundbreaking technology provides a maximum advantage, providing a superior experience over other brands. Ultra Comfortable Back Brace - Copper Joe Lower Back Support Brace is commonly used for people suffering from back pain, lumbar pain, lower back pain, sciatica, stiff or sore muscles, tendonitis, tendons & joints, and more! Keep your back compressed with our ultra-comfortable brace that gives you the support you need while still allowing you to retain your full range of motion so that your muscles can continue to work and strengthen. Copper Joe lower back brace gives you Optimal Support with Copper Infused Material for an everyday comfortable fit - Our high quality braces and sleeves can easily endure washing cycles and will not easily deteriorate over time.