An ergonomic stool but well balanced proportion of the aesthetic to function named Pivot Stool is designed for adapting all kinds of different seat position without restricting body movement.
The simple but iconic shape stool consists of three simple parts truncated cone, wooden concave pedestal, and upholstered pouf.
Its ball joint-like upholstered pouf allow keep an angle while sit on it due to friction between material.
This feature enable to leading to right sitting posision, or finding relax position. 
 
more about Pivot Stool