Easily adjust the amount of pressure on your back and spine with just one hand. Designed to provide you with comfortable support by allowing natural movement. Encourages proper posture and alignment of your spine. Adjust in seconds for light to high-level abdominal compression. The pulley back brace is built to comfortably and easily treat your lower back pain without a prescription. The lumbar support belt stabilizes your lower back to relieve pain, provides injury support, and prevents lower back injury so you can stay active. The back support belt creates pressure in your abdominal cavity which then, in turn, provides a hydrostatic lift in your lower spine to relieve pressure.