Allows maximum flexibility while working This ergonomic system has been developed to enable you to customize seating around both your seating preference and ergonomic needs. Our Brewer 9100 Series offers all of the benefits of our original ergonomic stool with smaller, sleek upholstery. PRODUCT BENEFITS Accommodates front to back reaching without sacrificing lumbar support Provides correct weight distribution, pelvic tilt, and comfort Promotes muscular health