1. Sturdy and Kid Chair: The 's desk chair is well made. Its main structure is made of high quality metal and plastic. The cylinder is strong, durable, and reliable. Both the backrest and seat cushion are filled with thick high resilience sponge. The sponge has high density and a good rebound effect, making your child sit comfortably. 2. Height Adjustable 360° Movement: This computer chair has a height adjustable function. You can adjust the height (17 21.7 inches). There is a knob under the seat cushion at the rear to adjust the depth of the seat, which is suitable for desks of different heights. This children's chair uses 360 degree swivel and self locking wheels, which can be fixed or moved as needed, smoothly without harming the floor. 3. Stability and Safe Design: The office chair is a 360 ° swivel rotatable task chair for r movement. The wheels will be automatically locked when the pressure is over 44 lbs. The star base supports stably, does not sway, and distributes weight evenly. It improves the stability for children to use learning chairs, so they can be used with confidence. This children's study chair is suitable for aged 3 18 years old of different heights. 4. Ergonomic and Comfortable: The curved seat provides good lumbar support and helps teenagers. Long term sitting will not cause stiffness. It improves the human sitting posture and prevents children's backs from being hurt during development. The desk chair adopts an ergonomic dual back support and a turnover armrest design. The backrest and armrests can well support the 's back, waist, and arm.