LoveHome Lumbar Support Back Cushion for Office Chair with 3-Way Fixation Strap - Black ALLEVIATES LOWER BACK PAIN -100% Proper firmness premium memory foam never flattens out. relieve lower back pain and tightness; support your lower back's natural curve promote a healthy posture ORTHOPEDIC LUMBAR CUSHION- large size:16.5x13x4.3 with ergonomic design can provide extra support & comfort to both center and side lumbar area, fits perfectly any office chair, car seat, wheelchair patio & dining chair and airplane seat etc. SUPER VENTILATIVE & BREATHABLE  innovative grooves, punch-through holes and 3D mesh cover Anti-sweat fabric provide great comfort and airflow 3 WAY FIX ADJUSTABLE STRAP- Adjustable 3 way strap can hold the back cushion securely in place and does not fall or slide down the chair 100% Satisfaction Guarantee  60 days hassle free return window, try it now with no worries.