Enhance ergonomics and sit up straighter with this back cushion. Compatible with most office chairs and car seats, this cushion helps reduce back pain by providing comfortable lumbar support and encouraging better posture. Vacuum-formed air pockets help keep you cool by improving airflow and gently massaging your back. Portable design for use almost anywhere. General Category: Seating Accessory; Sub-Category: Backrest; Color(s): Black; Color Family: Black.