Utilizing Humanscale’s Form-Sensing Mesh Technology, Diffrient Smart’s backrest has a tri-panel fit much like a custom-tailored shirt, providing exceptional, instant lumbar support. Featuring Humanscale’s patented weight-sensitive, mechanism-free recline, Smart automatically adjusts to the body weight of each sitter to provide perfect recline support. Further maximizing the ergonomic range of motion, Diffrient Smart’s high-performance armrests allow users to move their arms backward and forward, as well as inward and outward.