Features: Improve Sitting Posture: This sitting posture corrector is very suitable for students. It corrects their sitting posture, protects their eyes and spine, and allows them to grow up healthily. Height Adjustable: The adjustable height range is between 055mm and can be adjusted freely, suitable for most children, kids and students. Function And Practice: This posture orthosis can well help bone deformation caused by posture errors, avoid visual impairment, and can also cultivate a good sitting posture. Easy to Use And Install: Just clamp the bottom shelf on the thickness of 0-45mm table, and then adjust the height of the orthosis according to the child's height to improve sitting posture and protect eyesight. Double Chest Support Design: Effectively buffer pressure, write more comfortably, effectively absorb collision force, reduce front chest pressure, and make it safer to use. You can also use it as a nap pillow. Package Includes: 1 Piece Sitting Posture Corrector Specifications: Material: PP+Mesh Length: Approx. 178mm/7.01 inches Color: Pink, Blue, Yellow note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.