Yon can find the main features of Disk Dr. below: 1. Totally portable and easy to wear: enabled patients to live pain-free lives while wearing our product: Disk Dr. Waist, under everyday clothes without showing. 2. Clinically proven efficacy & market proven: not only Disk Dr. has been clinically proven its efficacy (85% of patients experienced an improvement in their condition within 3 days) but also selling in 31 countries and the sales volume is increasing in the U.S., Russia, Italy, Indonesia and in many others. (Sold over 2 million sets solely in Korea in 2008: worth over USD 1 million) 3. Active rehabilitation: Unlike any other lumbar support belts, Disk Dr. Waist strengthens the muscles around the lumbar vertebra by helping them exercise while wearing.