Smooth back, rib-less chairs with built in lumbar support are designed to provide optimum comfort yet are durable and strong. Shell is equipped with strengthening in the transition area between the seat and the back, providing the strongest copolymer polypropylene shell in the industry. Shell is designed to provide flexibility to the pupil so they can spend their concealed energy in a constructive way by being able to fidget and flex while sitting. All Silhoflex chairs pass CAL 133 testing without any additives.
