Noctis presetns an exquisite and elegant outline. We combine the ergonomics and physical therapy to design a distinctive lumbar support providing proper support and flexible tension. When the lumbar bears the most burden from sitting in the office for 8 to 10 hrs per day, how to offer a heathly and comfortable prop becomes the first priority of our designing idea. The seat foam thickness and hardness have been adjusted by our group to ease the discomfort from sitting for a long time. We choose the CAL fire-retardant fabric passed abrasion test, and the 3 level lockable mechanism can be adjusted to a perfect position to satisfy different user's demand.