2 cushions in one: lumbar support plus massage via vibrating acupressure relief for your lower back and spine. 6 acupressure nodes are activated when you lean against it to provide a gentle massage. Material: black leather and polyurethane foam for this high-density cushion. Compact size: 12. 5" x 12. 5" x 2. 5" and weighs only 1 lb. so it can be easily transported from vehicle, office and home. Requires 2 AA batteries (not included).