Health Touch Memory Foam Memory Foam Lumbar Pillow for Neck Low Back and Leg, Ergonomic design A great back support pillow while driving or working long hours to avoid aching back pain. 100% Pure memory foam,Perfect for most seats. Lightweight and durable. Health Touch Memory Foam Memory Foam Lumbar Massager Ergonomic Design – fit your back, knees, and legs to provide ideal support and pressure relief to these areas Improves Sleeping Posture: fits between your legs, knees, and behind your neck to accommodate both back and side sleepers; keeping your spine aligned while laying down Multifunctional Design: Versatile shape makes it usable as an under knee pillow, neck pillow, leg pillow for lower back pain, and lower back pillow for sleeping Lightweight and Durable - It can be used on a car seat, desk chair, wheelchair or any seat with a backrest. Being lightweight, it will be your favorite travel companion. Quality Materials - This desk chair back support pillow is made of pure memory foam , soft velour cover. Operated by AA batteries(not included)