Ergonomic Computer Desk Chair Mesh High Back Executive Task Chair With, Black. 1??ERGONOMIC 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. 2??COMFORTABLE 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. 3??STURDY DURABLE BASE - This height adjustable computer desk chair features a new upgraded gas spring pump lift system that allows you to easily adjust the height of the chair (17.3"-21"). The base of the chair is made of metal with a heavy-duty base that can carry up to 300 pounds, making it suitable for many types of people to use with confidence. 4??360 SWIVELABLE - This office chair comes with casters and the wheels are made of high quality nylon material that rolls smoothly on the floor for great stability and mobility, helping to promote comfortable sitting and keep you comfortable after a long day of gaming or working from home. 5??EASY TO ASSEMBLE - We have all the hardware and necessary tools for the male chair in the same box. We also provide detailed installation instructions and a video to help you. You can easily assemble this chair in less than 20 minutes.