1. Waist protection chair, ergonomics, waist protection decompression, make you sit for a long time 2. Reasonable support, designed according to the lumbar curve of the human body, 3 positions, 1 body, back, waist and hip to disperse the pressure and effectively increase the body burden 3. All-round ventilation can effectively eliminate body heat and sweat, and maintain a comfortable seat environment 4. Continuous waist support, stable and easy to tilt pelvis, help correct sitting posture 5. High-density sponge fully optimizes the shape and softness of the support surface