OfficeSource | This interchangeable seat cover for the 656M chair comes in eight unique and vibrant upholstery colors, plus two antimicrobial upholsteries. It’s the perfect opportunity for you to switch up your space as often as you would like. Fits most seats 19×19” in size without arm obstructions, 100% Polyester, form fitting with easy draw string adjustment, and fabric covers are machine washable.