Includes seat cushion only. Generously stuffed with foam and/or fiberfill, our cushions are covered with a sturdy, canvas like fabric called Sunbrella which resists damage from mildew and UV radiation. All the covers unzip for washing; spot clean. Cover or take indoors during inclement weather. Cushions thickness is 2.5". If you would also like to add back cushions please let us know we can help you add it to your order.