Description: Material: The chair posture cushion is made of PP material, which is soft, comfortable, breathable, sturdy.Chair Support: The Back Support Chair has an ergonomic shape, not easy to deform, fits the curve of the waist, hips and back, providing enough support for your back and waist.Features: The sitting and posture cushion has a hollow handle, a thickened protective bar, and is breathable and ventilated to maintain a comfortable sitting environment for you. Convenient to carry, lightweight design, easy to carry.Wide Application: The chair back support is most suitable for office chairs, computer desks, study rooms, restaurants, living rooms, sofas, recliners, and outdoors.Ideal Gift: The Back Support Pillow backrest and seat cushion are great gifts for drivers, programmers, students and sedentary people. Size Chart: 35cmx35cmx40cm/13.78inchx13.78inchx15.75inch Package Includes: 1 Sitting Posture Correction Chair Note: Please allow slightly errors 1-2cm differences due to manual measurement.