DetailsAdjustable lower back stretcher allows your back to be fully stretched and supported to reduce nerve compression and achieve a healthy back bend of the spine by reducing weight. 220LBS Max load. Place on a chair to help correct sitting posture, or on car seat to serve as a lumbar stretcher. *RELIEVE BACK STRESS & POSTURE CORRECTION - 96 Massage protrusions brings acupuncture effect by deeply pressing the specific acupoints. It helps activate the natural healing response and improve the bl