Lo-Bak Trax is the easy and effective way to take pressure off the spine, joints and nerves. Designed to help herniated discs, spinal stenosis, muscle spasms, lower back pain, sciatica, and spinal degenerative disease. The ergonomic design gently distributes dual traction force to stretch and decompress the spine and discs. Three easy steps will help relieve back pain: lie down, bend your knees, and push! Measures 22.9 x 9.2 x 4.8 inches and weighs 3 pounds.