Ergonomically correct

Humans are not made for sitting idle, but for movement. Doctors recommend dynamic movements when sitting. Tumbly encourages this way of sitting.

As opposed to with a normal chair with back support, Tumbly ensures you are always sitting up with your back straight. This prevents that there is too much force on the back, and thus wear & tear. The way one sits on the Tumbly prevents back and neck pains. Also, because you do not sit with a bend back, but straight up, breathing is much easier and more comfortable.