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. And 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 universalcasters enable immobility---it auto-looses when stand-up and auto-locks when feeling pressure over 66 lbs. This function makes the desk chair safe for use and good for concentration.FeaturesErgonomic design with back and lumbar support for proper sitting posture Equipped with armrests to ensure a comfortable support Adjust the height from 31.5 to 36 inches to 91.5 cm to fits growing kids 360-degree swivel seat for easily changing the direction Sit-brake wheels keep the chair secured and stable under 66 lbs of pressure Comfortable upholstered seat with detachable cushion Mesh fabric for air ventilation and heat dissipation Fast in manual assembly with the help of detailed instruction The max loading capacity of the chair reaches up to 330 lbs Color: Grey Material: PP, Sponge, Mesh Fabric, PVC Product Dimension: 21.5" x 20" x 31.5"-36" (L x W x H) Seat Size: 17.5" x 16" (L x D) Armrest Height: 22" Seat Height: 16"-21.5" Net Weight: 15 lbs Package Includes: 1 x Kids Desk Chair 1 x Instruction