Height Adjustable Kids Desk ChairSeat height of armless small desk chair can be adjusted from 16.7" - 20.7". Can be well adapted to the needs of growing children with different heights of the table( 100lbs can freely adjust the height ,100lbs need to find the help of parents) Ergonomic Backrest Design17.5" wide wrap-around backrest and C-shaped back fit the back curve of the body. This computer chair suit for kids aged 4 to 12 who require sitting for long hours of learning and studying. effectively reducing kids back stress and helping them to develop good sitting posture. Comfortable & BreathableThe 3D woven breathable mesh is durable and breathable, and prevents body heat. The rolling chair seat is padded with high-density sponge, providing more comfortable sitting experience for long day study Reliable & DurableThe sturdy three-stage air rod and explosion-proof base plate not only have a strong bearing capacity, but also improve the safety and stability