Smiley Ergonomic Height Adjustable Kids Chairs (Blue)1. Comfortable nursing chair: This ergonomic childrens desk chair can support 150 200 pounds of weight through a sturdy air lift device. Thick flame retardant filled foam and high quality fabric decoration, also includes additional chair covers 2. Anti spine design: The unique back design helps children stay in a long lasting and comfortable learning environment. The seat can also be expanded to increase space. 3. Multifunctional: multifunctional