Fully Adjustable Office Chair: Customized chairs, featuring with an adjustable 2D headrest, backrest with 90° to 120° recline, and 3D adjustable armrests for multiple work postures at will while relieving the back pain by long hours of sitting. Adaptable Lumbar Support: Our computer chair lumbar support system adjusts 1.18″ forward & backward and 2.16″ up & down to perfectly fits the spine of the human waist and back, protecting the health of the spine. (matching your height and body shape). Supportive Mesh: The minimalist mesh backrest provides responsive support, promoting air flow without getting bogged down with sweat. All the accessories of our ergonomic office chair have passed the test of BIFMA and SGS, guarantee for personal safety. Comfy Desk Chair Seat: Adapting 3.14 thick high-density foam to desk chair seat, double your comfort in daily work moreover high weight capacity 300 lbs for long-term durability. Wider seat provides a larger load-bearing area and relieves pressure on your buttocks. Flexible Armrests: Move smoothly rounded PU-padded armrests forward or back and swivel them left or right to find the optimal arm position. Flip the armrests up when you want more freedom or to easily slide the ergonomic chair under the desk. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store. We are working with different suppliers in USA to deliver the item to your doorstep. If you have any issues regarding the item, Feel free to ask.