Size: 11 x 16 inches. Wide applications Slide the adjustable strap onto pool loungers or outdoor chairs. The cover is water, stain, and oil resistant, helping you enjoy summer pool time with added neck support. Use as lumbar support on road trips. Suitable for workfromhome setups and most chairs to help alleviate back tightness. Materials and care Removable, machinewashable cover made from soft fabric with stain, water, and oil resistance; designed to resist fading in direct sunlight. Filled with flame retardant polyester, providing a breathable, softfeel yet comfortable support for the neck or lower back. Elastic adjustable strap Sturdy strap stretches to accommodate chair backs from 16 inches to 65 inches, ensuring the pillow stays on the chair without slipping or sliding. Hidden zipper closure design Hidden zipper allows easy thorough cleaning and helps keep hair from getting caught. Provides a sleek look when used as a decorative piece on your sofa. Use scenarios Poolside and outdoor use: place on pool loungers or outdoor chairs for neck support and easy cleaning after water or sunscreen exposure. In the car or on a trip: use as lumbar support on road trips for better posture during long drives. Home or office: attach to your desk or living room chair for back support, or use as a decorative pillow on a sofa when not in use for support.