Back Relax™ is the revolutionary lotion that helps relax your back to ease tightness and pain so you can move more freely. Perfect for those who suffer from back pain and back mobility problems, this specially-designed formula contains magnesium which has been used by chiropractors for years because it penetrates deep into your back muscles to gently ease tightness, reduce pain and improve your movement. Spray on affected area. 3 fl. oz.