LO-BAK TRAX™ is the innovative, safe and effective way to help get relief from back pain. Easy-to-use, portable device uses dual traction to decompress the spine and discs. Just lie on your back, pull up your feet and push! Designed to provide relief from some of the most common causes of back pain: spinal stenosis, herniated discs, degenerative disease, sciatica, muscle spasms. Includes DVD. 22" x 7¾".