Features: -Consists of a high-quality polyurethane memory foam core with a durable outer cover. 4D breathable mesh cover, cool not stuffy. -Gives you maximum seating comfort while at the same time ensuring that your posture is optimally upright. -The back support seat cushion has a hidden zipper so the cushion cover can be easily removed and washed by hand or machine. -Comes with an adjustable strap for easy attachment to the seat. -The bottom has non-slip particles, which is not easy to slide and is firmly on the seat. Specification: Material: polyester Colour: black Size: 47*42*8cm Package Included: 1x Seat cushion .