The Gripper Non-Slip Omega Jumbo Rocking Chair Cushions, Indigo 66% Polypropylene/34% Polyester Imported Non-Slip Gripper bottom keeps chair cushion in place Seat measures: 17 x 17 x 3 inches. Back measures: 21 x 17 x 3 inches Covering:66% Polypropylene,34% Polyester. Fill: 100% Polyester Spot clean only