JOYFLY Ergonomic Office Chair, Computer Office Chair for Adults, Mesh Home Office Chair with Dynamic Seat & Adjustable Headrest, Task Chair for Big and Tall People with 4D Armrests, 450lbs, Black - JF921-BLACK

• 【Customized Ergonomic Office Chair】:Ergonomic office chair height lift function, 90 ° - 135 ° tilt lockable angle, multi-position adjustable dynamic seat, 4D armrest can be adjusted up and down before and after, 3D multi-angle adjustment of the headrest. You can adjust the comfortable ergonomic office chair exclusively for yourself. 【Adjustable Seat Depth】:The seat can slide back and forth, dynamic seat can protect the natural curvature of your spine, help you find the most adaptable depth and angle, so that your back and the back of the chair more closely to relieve muscle pressure. Unlike other office chairs, no matter what your body shape, this computer office chair responds to your body shape to provide you with tailored support. 【3 piece Backrest】:3-piece backrest that accurately positions the neck back and lumbar area to relieve muscle tension. Regardless of the posture, the lumbar back support of the ergonomic office chair always fits the body and effectively protects the correct shape of the spine and lumbar area, conforming to the unique body shape of each user and experiencing unparalleled comfort. Widened and enlarged seat cushion with immersion design to reduce the pressure on the hips and thighs, long-term use without sagging and deformation. 【Durable & Stable】:The computer office chair is made up of BIFMA certified quality materials, a powerful 4-stage air pump certified by SGS, while the thick chassis provides strong pressure resistance and greater safety. The all-metal five-prong base can withstand up to 1,500 pounds, and the 360° silent casters roll smoothly to effectively protect the floor. High-density woven mesh made of flexible and friendly mesh material, durable resistance to wear and tear at the same time can slow down sweating or heat. 【Easy To Install & Warranty】:You can easily install the comfortable ergonomic office chair in 25 minutes. In addition, the ergonomic gaming chair has a 3-year warranty, if you encounter any product problems, please email JOYFLY, we will solve the problem perfectly for you.