"【Ergonomically Designed Office Chair】A great series of ergonomic features, such as the multi-adjustable headrest, height adjustable armrests, flexible lumbar pillow, adjustable back tilt angle, and adjustable seat height, provide customized comfort during long hours of work, gaming or other activities. Say goodbye to back pain and stiffness and hello to good posture and improved productivity.【Large Cushioned Seat & Mesh Back】With its generous 20.5""(W) x 21""(D) seat and high-elastic foam cushion, this comfy desk chair provides adequate cushioned support and relieves fatigue after extended sitting. Plus, the breathable mesh back lets air, body heat, and moisture to freely pass through, keeping you naturally cool.【Adjustable Head Pillow & Armrests】The mesh headrest can be easily raised and lowered by 8cm/3.1'' in accordance with your sitting postures. With up to 45° of angle adjustment, you can find the perfect angle while working at your desk or taking a breather and kicking back. More, the armrests can be adjusted vertically to a height of 7cm/2.8'' to suit your needs.【Designed for Different Sitting Positions】Whether you like to sit upright for keyboarding or lean back and relax during a break, the backrest can be reclined and locked at any position between 90-135 degrees to meet your preference. The seat height can be easily shifted between 17.7 and 21.3 inches for a custom fit.【Simple Seat Height & Tilt Adjustment】The seat’s height ranges from 45-54cm (17.7-21.3’’) off the ground to accommodate your personal sitting preferences. This multi-functional office chair also features a reclining and lockable backrest allowing up to 135° of tilt to keep you in the comfort zone for your next assignment or simply to lounge back."