Butterfly+ chair adopts not only the natural aesthetics but also functionality as a chair. Equipped with Italian Donati self-load mechanism with four-position locking which allows the backrest to be automatically adjusted according to individual body weight. With the addition of seat slide functionality you can now ensure that the Butterfly+ fits you perfectly. Flex-back and lumbar-free designs in an S shape perfectly fit the curve of the human spine and bring unparalleled comfort. The cladding structure makes lumbar support-free design feasible and gives all-round support to your lumbar region. The Butterfly+ provides excellent arm support with its 2D arms.