85 Polyester, 15% SpandexHIGH QUALITY MATERIAL: Made with spandex premium fabric that is softer, more flexible and easy to stretch. Our armrest covers are suited for more than 90% of fabric chair armrests. Please Note: Our cover is more suitable on fabric sofas.MEASUREMENT: Suitable for 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 before 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 effortlessly. A must-have for homes with children and pets. Easy installation and removal, machine washable.NOTE: 2PCS in ONE packageEASY TO INSTALL: The installation process is simple and easy to operate.