SITTS is an innovative sitting device designed to naturally provide back pain relief by optimizing your posture and reducing the stress poor posture places on your back muscles. Our cushions comfortably force you to sit up straight anytime you sit. The patented shape relaxes glute muscles relieving pressure and strain on the tailbone and sitz bone, while improving circulation to the legs and lower back. SITTS Posture Cushions work on any type of seats, hard or soft, including office chairs, sofas and car seats.