This chair is customized for children. Beside the many adjustable parts, it features all new the sit & brake; brake casters. This type of casters stop the chair from moving when someone is seated. This safety feature has become a standard for the kids furniture manufacturers. Kids are growing fast. And our chairs grow with the users. There are 3 major adjustable parts on this chair: seat height, seat depth, and lumbar support. We want to make sure different users can easily adjust this chair to their best comfort.