Height adjustable children's desk chair---grow with your kids! Thanks to a premium gas lift system and a smooth adjusting lever, this chair lifts up and down effortlessly. A 360-degree swivel seat base is equipped for more fun and an easy-changing direction. The ergonomic backrest urges a correct seating posture with a y-shaped design to provide the back with more support. The seat base is padded with a high-quality cushion, which is breathable, softer, and more comfortable as well as detachable for easy cleaning. 5 Universal Casters enable immobility---it auto-looses when stand-up and auto-locks when feeling pressure over 66 lbs.