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Ergonomic Design : This chair design is based on Ergonomics concept.The lumbar support is adjustable helps release the spinal pressure,and flowed waterfall arc seating design thigh support is comfortable, it will make you more comfortable while work. Breathable Mesh Materials: Our executive chair adopts high-grade mesh, fabric and PA materials with a sturdy construction that is durable in use and guaranteed to withstand the test of time. The mesh back can keep your back feel breathable and comfortable while Long time sitting at work. Variety of Adjustment Options : This mesh desk chair features multi-dimension adjustable lumbar support that allows you to adjust the height and depth as per different sitting postures. Together with the 3 levels lockable back tilt adjustment, these will make a world of difference in your comfort and health. BIFMA Certification: The mesh and fabric executive chair is made with excellent craftsmanship and upgraded materials, a stable construction with BIFMA X5.1 certification and the weight capacity up to 275lbs.