1ERGONOMIC OFFICE CHAIR - This office chair with adjustable headrest and lumbar cushion, ergonomic design, so you can keep your back relaxed even when sitting for a long time, more conducive to your physical and mental health. 2COMFORTABLE & BREATHABLE - This mesh office chair with armrest backrest 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 resilience sponge cushion wrapped in durable breathable mesh fabric, which is elastic and not easily deformed and can be kept comfortable for a long time.