85 Polyester, 15% Spandex HIGH QUALITY MATERIAL: Made with spandex fabric that is softer, more flexible and easy to stretch. Our armrest covers are suited Compatible with more than 90% of fabric chair armrests. Please Note: Our cover is more suitable on fabric sofas. MEASUREMENT: Suitable Compatible with armrests that are 18-21 inches long, 6.5-8 inches wide, and 8-11 inches high. One-size-fits-most, and comes with a pair of armrests in a package. Please refer to the product size beCompatible withe purchase. FUNCTION: Give your armrests a brand new look while protecting them from daily wear and tear, stains, and scratches. Extend the life of your armrest or fix a broken and worn out armrest quickly and efCompatible withtlessly. A must-have Compatible with homes with children and pets. Easy installation and removal, machine washable. TIPS: The installation process is simple and easy to operate. To prevent the product from moving or slipping off, we also put 10 invisible design twist pins in the package. The pins can be easily inserted into the sofa without tearing or damaging.