Stool made from stable, friction-welded, durable and extremely scratch-resistant polypropylene, fully recyclable. Comes with a lightweight foam seat shell or optionally with an extra-soft padded artificial leather cover. The thermoplastic base is screw-fitted to the polypropylene body. Chair sizes in 4 fixed heights in accordance with DIN EN 1729 and an additional oversize option. Function: Facilitates free mobility under controlled conditions thanks to rounded set-down surfaces which stimulate the full apparatus of movement. Easy to carry thanks to ergonomic, wave-shaped seat edge for gripping which also prevents the stool from rolling off. The stool is easy to transport and can be stacked with others to save space.