Sitting posture correction cushionMaterial: reinforced pp memory foam Net weight: 700g Product size: 353531cm Notes:1.Due to different displays and lighting effects, the actual color of the product may be slightly different from the color shown on the picture. Thanks!2.Due to manual measurement, please allow slight measurement deviation. This lumbar support chair Cushion effectivelyWith a backrest that provides strong support for the natural curve of the human back, keeping the back straight and enveloping the waist. It is comfortable for long periods of sitting without fatigue Squeeze the seat surface and backrest to easily fold, with a thickness of only 5.5 inches after folding. The chair cushion weighs 2.54 pounds, making it easy to store and carry The product is made from 6mm thick plastic, with a curved back design that effectively increases the overall thickness, easily supporting users over 200 pounds. The back curve conforms to the natural curvature of the human body, featuring an organic design of the product's curves. The surface is bonded with extra-thick sponge, making it more comfortable to sit on This chair cushion is designed for children, teenagers. For adults, it is recommended to use with hip circumference less than 41 inches. Effectively help protect the waist and back, correct poor sitting posture