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