WEATHERPROOF POSTURE SEAT: Relieve back pain with better posture. BackJoy SitSmart is a safe and effective way to relieve lower back pain and improve posture. SitSmart automatically positions your body in correct posture for all-day sitting comfort and posture support. This simple posture corrector works in any type of seat, from office chair to car seats, even hard bleachers.
Comfortable waterproof covering for indoor or outdoor use.