Help your posture and any accompanying back and neck pain while you're at your desk all day in the Merrithew(TM) Sitting Cushion. This dual-purpose cushion supports your spine seated or during workouts, increasing core strength. Perfect Posture Reduces pressure on the tailbone Use for coordination, balance and stability exercises Textured surface helps improve blood flow Best Uses Place on any sitting surface Sit tall without slouching Reduces lower back pain while seated