Materials and comfort: The pillow features a removable, machinewashable cover made from a soft, durable fabric with stain, water, and oil resistance, and it resists fading in direct sunlight. It is filled with flameretardant polyester to provide breathable, softfeel yet comfortable support for the neck or lower back. Closure and cleanability: A hidden zipper closure allows thorough cleaning and prevents hair from getting caught, while maintaining a sleek, decorative look when used on a sofa. Size and compatibility: 11 inches by 16 inches. The pillow is designed to be versatile and fits a wide range of chairs and outdoor furniture. Applications and practicality: Outdoor and pool use: Slide the strap onto pool loungers or outdoor chairs; the cover's water, stain, and oil resistance helps you enjoy summer time without worrying about messes. Home and work: Provides extra neck support or lumbar support on most chairs at work from home setups and in various seating arrangements. Travel and onthego: Serves as lumbar support during road trips, enhancing comfort on long drives. Adjustable strap for secure fit: Sturdy elastic strap stretches to fit chair backs from 16 inches to 65 inches, ensuring the pillow stays in place without slipping or sliding.