NEW in 2018 and different than our original SitSmart series! 2x comfort cushioning for your lower back! Padded EVA foam covering for all day comfort. Wider seating surface for all body types with a finger grip for adjusting and visual indicators to correctly sit on the product. Natural safe and effective for back pain tailbone sciatica and lumbar relief Ultra portable seat cushion. Perfect as a car seat cushion office chair cushion on planes or on any hard surface Tilts pelvis upright to engage core muscles to optimize your posture and relieve lower back pain Weatherproof / waterproof seat pad fitting adults up to 300 lbs. The latest revolutionary back pain relief seat in the SitSmart series Posture Core relieves back pain by optimizing your sitting posture. It features some simple new benefits that make this SitSmart even easier to use. SitSmart Posture Core positions your body to naturally relieve back pain and keep you sitting comfortably for hours. Natural safe and effective back pain relief Maximum comfort for longer periods of sitting Works in any seatoffice car homeor anywhere you sit! Tilts the pelvis upright to engage core muscles Weatherproof / waterproof Fits adults up to 300 lbs.