The Invertrac™ unit has features that are not available on other bent knee traction units. They make the Invertrac a popular choice for the professional wanting to offer an easy to use unit for inversion therapy. The unit has been designed for ease of use for the patient with chronic or acute low back pain. The thigh pad is attached to a crossbar with a low center of gravity allowing complete control during both inversion and dismount. The femur adjustment dial gives "the perfect fit" behind the back of the knee and lets the user hang completely "free" with only the thigh on the thigh pad. The Invertrac has 5 settings to accommodate most leg lengths. The thigh pad is designed for maximum comfort, which is important for extension or flexion exercises. The front "M" beam allows hand assisted extension exercises and helps in the dismount