PPER/LOWER BACK PAIN RELIEF FOR DESK CHAIRS, CAR SEATS AND AIRPLANES, LIGHT GREY $20 Size Lumbar pillow:20 "L x 12 "W x 3". Seat cushion: 18.9"x16.5"x2.8" Tips, this lumbar cushion and seat cushion is compressed packed with shipping, when you receive, it is in flat state, this is normal not a product defect, please open the package and leave it for 24 hours, it will recover its thickness and it's supportive. Healthy Sitting Posture Unlike other lumbar support pillow, this back support pillow promotes a natural cervical curve, keeping your head above your shoulders, which opens up your chest and maintains a correct sitting posture. T-Shape Design The unique T-shape design makes this back support pillow one of the best back and lumbar support pillow, which can provide support for the entire back and help relieve back and lumbar pain. Compared with the kind of back support pillows that enclose your entire back, this T-shaped product has less contact area with your back and is more breathable and comfortable Foam Inner & Breathable Shell High quality foam inner with strong support keeps your back in the right position and won't collapse even after a long time of use. Breathable mesh fabric shell keeps the air circulating, not stuffy and sweaty. Convenient It can be fixed on any type of seat, whether it's an office seat or a car seat, truck seat, etc., giving you back and lumbar support. Adjustable straps help you fix it in the position you need, the position of use is adjustable.