Key Benefits Ergonomic support for growing kids: dual back support and turnover armrests help align the back, waist, and arms with the chair. Designed to fit kid body curves and promote good sitting habits for ages 3 to 18. Flexible size adjustments: easy height and depth adjustments to fit different desks and growth stages, improving ergonomics and comfort. Durable and safe construction: main frame uses quality metal and plastic with a strong, reliable cylinder for long lasting use. Comfortable seating: backrest and seat cushion filled with thick resilience sponge, density with good rebound for comfortable seating over extended study or play sessions. Key Features and Specifications Ergonomic design: dual back support and turnover armrests provide stable support for the back, waist, and arms. Age range: suitable for children 318 years old. Height adjustment: handle on the right under the seat cushion adjusts seat height from 17 to 21.7 inches. Depth adjustment: a knob at the rear under the seat cushion adjusts seat depth. Build quality: main structure made of quality metal and plastic; durable and safe; strong cylinder for reliability. Comfort materials: backrest and seat cushion are thick with resilience foam, offering good density and rebound. Size, compatibility, and performance Seat height: 17 to 21.7 inches to fit different desk heights and growth stages. Depth adjustment: enables better seat fit for various body sizes and desk setups. Materials: metal frame and plastic components provide sturdiness and durability; longlasting performance. Comfort: density foam cushions maintain shape and provide comfortable support during study, drawing, or computer use. Use scenarios Homework and study time at a kid desk, maintaining proper posture during long sessions. Computer or tablet time, offering stable support and adaptable height to match desk height. Reading, drawing, or crafts at a desk, with comfortable seating that supports active use. Notes Height and depth adjustments are controlled via the underseat mechanisms described: righthand handle for height and rear knob for depth.