Open to something special? Topstar Sitness® Bob office stool Topstar's Sitness® Bob office stool offers a practical alternative to traditional models with a backrest and can be adapted easily to various work environments. With its modern design, it blends harmoniously into any interior and supports ergonomic seating. The special features of the model If you need a little more freedom of movement, this seating option is ideal thanks to its swivel function. It's also practical The model is also height-adjustable and rotatable, which only adds to its appeal.