Our chairs are built for comfort, with an ergonomic design that allows you to move easily whether you're working or playing games, and our backrests support your back and will make you feel comfortable and relaxed! This chair has a variety of designs, such as our backrest is mesh-like design is more breathable and flexible, our armrests are fixed armrests, when you work and study or play games can be very good and lasting to maintain a certain height and position, convenient and agreeable, and our tray is using a better work rest, more stable Oh. And our entire chair is designed with an ergonomic curved back, which protects the spine and gives you more room for release. We also designed a lumbar support behind the back, when you are tired when lying down can better maintain your waist .... Have you been impressed by all the design features? Don't worry there's more at the back! The great thing about our office chair is that it not only helps to maintain your correct sitting posture, but also helps to relieve your stress! Our air rod is ANSI/BIFMA*5.1-2017 certified, making it a reliable and sturdy option for users weighing up to 330 lbs. The height adjustment of the air rod is 10cm, so you can adjust it to your preferred height. The high-density virgin foam and recycled foam are built in, so it's soft enough to keep you in a good mood all day long!