SitSmart Core Traction engages your core and positions your body in optimal posture to naturally relieve back pain and keep you sitting comfortably for hours. If you sit for long periods of time, posture support is key. This simple posture corrector restores the natural curvature of the spine to relieve lower back pain. SitSmart Core Traction features premium fabric covering plus anti-slip grip areas for all day comfort and stability. Works on office chairs, car seats, or anywhere you sit.