Pac Chair, Pro Active Chair, is a new-concept office chair. New in terms of shape, materials and design parameters. It adapts easily to the different positions adopted by the user during the course of a working day. Pac Chair is an advanced-concept product, developed on the basis of an innovative swinging mechanism that accompanies body movement in a dynamic and natural way. Some component parts of the chair have been designed so they can be easily taken apart and put together again by the user. The slot-in seat and back support can be easily changed, as can the transparent frame and the upholstery.