Thank you for viewing. This is the Backjoy Posture Plus Camouflage Mini. It guides the pelvis to the optimal angle, reducing the burden on the lower back and back. It's a mini size. Recommended for women who focus on creating good posture, as well as students and children with poor posture who want to improve their concentration. Please use it on a chair with soft cushioning. 【How to use】 Sit on the Backjoy and pull the handle towards you until the triangular hole is visible between your legs. The key is to avoid leaving a gap behind your buttocks so that the area under your tailbone fits. ■ Weight目安: 30kg～60kg ■ Materials: 　Back／Synthetic polypropylene 　Surface／EVA ■ Dimensions (actual measurement): 　Maximum width／275mm 　Length (when placed flat on the floor)／365mm 〈Condition〉 ※ There are scratches on the black resin on the back. ※ There are no noticeable stains on the seat. Please understand that this is a USED item. Thank you for your understanding. No. 260330