10 Pack Ergonomic Office Chair with 3D Adjustable Headrest, Mesh Home Office Desk Chairs with Lumbar Support & Flip-Up Armrests for Office, Home and Conference Room(10 Pack)

【S-Shaped Bionic Backrest】Ergonomic office chair adapts to the curve of human spine, providing head,shoulder,back,hip,hand,lumbar support. Scientific design to relieve shoulder and neck pain caused by long hours of work【Flexible Adjustment】Office desk chair with 4'' up and down adjustable seat height to meet the use of people of different heights. 90°-120° adjustable backrest tilt angle to adapt to various sitting postures. Widened 3D curved foam headrest, adjustable height and angle, effectively support your head and neck【Reliable and Durable】Sturdy level 3 pneumatic pole and thickened explosion-proof base plate not only have strong load bearing capacity, but also improve the safety and stability of use and prolong the life of the chair. Max load capacity of 320BL【High Resilience Sponge Cushion】The home office desk chair is made of high density foam cushion is not easy to collapse , comfortable and breathable , not tired after sitting for a long time. High elasticity mesh wrapped for better breathability【After-Sales Service】 Refer to the installation manual or video, use the included tools, you can complete the assembly of the mesh office chair in about 20 minutes. 3 years of after-sales service！Professional team is online to solve your problems