ERGONOMIC LUMBAR SUPPORT- The design of this mesh mid-back office chair lumbar follows the curve of human self-heating, giving you comfortable lumbar support, allowing you to keep your back relaxed even when sitting for long hours, which is more beneficial to your physical and mental health. BREATHABLE & COMFORTABLE CUSHION - The backrest of this mesh mid-height fixed armchair is made of mesh fabric, which is breathable and keeps you fresh even after sitting for a long time. The cushion of the chair is made of high rebound sponge cushion covered with durable breathable mesh fabric, which is flexible and not easily deformed, so you can stay comfortable for a long time. 360° SWIVEL - This 360° swivel computer desk chair comes with swivel casters, wheels made of high quality nylon material, rolls smoothly on the floor, has good stability and mobility, helps promote comfortable sitting, keeps you comfortable after long hours of gaming or working at home, and th