SIHOO M18 Office Chair, Mesh Computer Ergonomic Chair with Adjustable Lumbar Support, High Back Chair for Big and Tall, Black

【Comfortable Foam Cushion】Office chair. M18 home office chair cushion has a thickness of 3.15 inches, featuring high elasticity, resistance to deformation, and durability against dirt. Designed in a W shape, the cushion helps alleviate pressure on the thighs and lumbar region to offer a more comfortable sitting experience. The backrest of the M18 Mesh Office Chair is made of breathable, high-strength, stain-resistant mesh. It helps to maintain air circulation and keep you cool when sitting for long periods of time. 【Ergonomic S-Curve Design】SIHOO office chair. Support for the cervical spine, Fits the curve of the back, Protects the lumbar spine. Bidirectional adjustable lumbar support. Reduce strain and stress on your muscles, tendons, and overall skeletal system. Adjustable Headrest, Provide a great neck support. 45° Rotation Angle, Up and Down 3.9″. 【Adjustable Soft Armrest】SIHOO ergonomic office chair. Fine adjustment of the armrests to suit your body shape, posture and desk height. Soft armrests, 2.8in Adjust Up & Down. Lockable Backrest with 36° Tilt Adjustment. 【High Quality】Mesh computer ergonomic chair. This office chair has passed the US BIFMA and SGS test and meets the furniture industry standards. Therefore, you can use it with confidence. 【Easy for installation】The office chair is packaged with instructions, labeled parts, additional screws and rubber gloves and can be installed in half an hour. 【Warranty】Product warranty period is three years. If there is any quality problem, please contact us. After confirming, we will change the accessory for you. We promise to provide you with zero profit product accessories within three years of the warranty period.