Polyester DIMENSIONS – 17.3” D x 17.3” W x 17.9” H. HIDDEN STORAGE – Lift the top lid to reveal hidden storage; interior dimensions are 11.75” D x 13” W. MAXIMUM COMFORT – Upholstered in gray polyester fabric, it features a removable, soft-cushioned lid. ROUNDED BASE – Rock and wobble the ottoman for extra comfort. WEIGHT CAPACITY – The lid supports up to 400 lb. while the interior base supports 50 lb. VERSATILE DESIGN – The ottoman can serve as a tilting footstool or a sitting stool.