Komene Ergonomic Office Chair: Weight Capacity Over 350Ibs, High Back Mesh Executive Chairs with Adjustable Headrest Backrest and Flip-up Armrests, 360-Degree Swivel Task Chair Black Posture-Perfect Ergonomics Advanced Design Assist You Sitting Proper Which features a unique made to mimic the human spine. The chairs back can always manage your posture to keep your spine in alignment and supporting the lower back, no need any adjustments on your part while the supportive back,especially to encourage proper posture and alleviate lower your back pain. Adjustable Height & Headrest Create for More RelaxationVarious tension height adjustments, a very handy pneumatic lift system that raises or lowers the chair smoothly combined with a supportive headrest together, make for your siting impressive and satisfying to take a seat in. Freely 110 Degrees Tilt Backrest Think of Your ComfortThe chair has an ergonomic mesh back that avoids excessive heat and moisture build-up,so you will feel fresh while sitting on it.The backrest of executive office chair can be tilted around 90-110 degrees fit for your own needs. Full Mesh Air Cushion Built for The Most DurableWe select the high quality of fabric to make sure that woven tightly and strong as a result,our mesh chair use rigid plastic to hold the mesh weave enhance the durability that can support for using long years. Perfect Fit for Heavy Duty & Easy Assembly360-degree swivel, made of heavy-duty noiseless casters, its explosion-proof base plate with 5-star steel increase more safety and stability. the weight capacity supports over 350Ibs.We have attached the install instruction step-by-step to help you more easier to assemble it upon arrival. The mesh design on the chair&#039;s back enables airflow along your back, helping to keep you cool dry, and feeling fresh as sit to work. Easily to clean up even you spill coffee or other liquid on it. Lack of sweat also results in less maintenance for the chair. The Armrest: can flip-up for save more space, make you easy push chair below the desk. The Headrest: also height adjustable and it is bigger than normal chairs on the market for better rest. Tilt Function: you can tilt the backrest by waist and back strength and open &#034;tilt&#034; switch to fix the position of backrest; If you want to revert it, please close the &#034;tilt&#034; switch, lean back at a time and then let backrest revert with your sit up. Tilt Tension Adjustable: you can rotate the cylindrical adjuster to control tilt speed. 1 * Komene Ergonomic Chair 1 * Assembling Instruction