Doctor recommended and endorsed by David Price, the former head trainer for the New York Jets, this Pain Checker back band is a revolutionary way to combat nagging back pain. It's created from a special fabric that harnesses the power of a patented bio electric carbon technology to naturally relieve pain. It works by creating natural impulses that interfere with pain signals. Plus, it helps provide a deeper, more restful sleep. Best of all, it's lightweight, comfortable and can be worn virtually undetected under clothing. Machine washable. In adult sizes XL (waist sizes 40"-46"). No medical claims expressed or implied. This is a customer return. Customer returned items have a 7 day return policy.