1.Premium memory foam: Our lumbar cushion car seat is made of high density memory foam. It is soft, provides enough support and doesn't become flat over time. The lumbar cushion core adopts premium memory foam, which efficiently rebounds and comfort support, keeping your lower back in the right position, providing comfort for a long time and the right balance between support and comfort. 2.Pain relief for the back: Constant sitting, whether at work, in the car or at home, can strain your back but it doesn't have to. Place this lumbar support pillow on any chair or seat for instant ergonomic support. The back cushion sofa adapts to the contour of your waist, fills the gap between waist and seat, supports the lower back, reduces strain on the waist, relaxes the muscles and relieves pain. 3.4D Breathable, Easy to Clean MeshThis lumbar support pillow for office chairs has a breathable cover with a zipper design. You can easily remove the mesh cover to machine wash if necessary. This allows air to flow between you and the pillow, keeping you dry, cool and comfortable. Note: memory foam do not wash. 4.Adjustable fastening straps for different seats: The lumbar cushion office chair is equipped with adjustable fastening straps that enable easy and non slip attachment to office chairs, car seats or home chairs. The flexibility of the straps makes the pillow suitable for use at home and in the office.