Low Back Lumbar Cushion, Memory Foam Pillow, Support For Home or Office Chair, Car, Airplane, Size Medium REDUCES LOW BACK PAIN. ERGO-Pedic's Lumbar Cushion provides low back support by restoring healthy spinal curvature to relieve discomfort in bulging, painful discs. HELPS YOU SIT MORE COMFORTABLY. The therapeutic contour shape aligns your posture to reduce abnormal pressure on hips, reduce sacrum and pelvic pain when sitting and reduce spinal stress and degradation. THE DURABLE NYLON STRAP HOLDS CUSHION IN PLACE. The handy quick connect Clips allow you to attach the cushion to your chair or car seat, which eliminates constant readjusting. Nylon strap will not stretch like common elastic straps do. THE PREMIUM MESH COVER PREVENTS OVERHEATING. This ensures your comfort because the cushion cover breathes to stay cool. The removable, washable cover is guaranteed to last as long as you own your ERGO-Pedic Lumbar Cushion. LIFETIME GUARANTEE. We are so confident in our products, that in the unlikely event the cushion ever fails to perform, or the cover wears out, or the zipper breaks, we will replace your ERGO-Pedic Low Back Lumbar Cushion for FREE!!!!