Hille Ergostak Polypropylene Stacking Classroom Chair The Hille Ergostak chair achieves all the essential maintenance-free durability of an all plastic chair, but it also responds to the demand for a sleeker, better looking chair for new and future classrooms. In addition to its looks, Ergostak has been designed to achieve much higher levels of ergonomic postural support than the existing chairs in the market. The result of over 12 years of rese
