Indoor Outdoor Dining Garden Patio Home Kitchen Office Chair Seat PadsCushion Material: Outside: Pongee; Inside: Sponge Size(approx): 40x40(15.75"x15.75") These padded cushions come with tie on straps to secure them to your chairs Suitable for home, office, coffee shop and so on Note: the Color will be sent by randomly, pls do not choose color,Thank you.