Based on the You’s revolutionary design, the [YouToo] version comes with reengineered nylon back frame for even more flexibility and support. It’s patented system built into the u-shaped backrest allow the user to adjust the depth of  the lumbar support, comfortably  from the seated position. The unique u-shaped backrest encourages the user to sit actively in an upright position with an optimal spinal support, which helps to prevent spinal compression.