Ergonomic Design The ergonomic chair built-in lumbar support and back support help you been in right sitting posture,protecting your neck and waist,ensuring you sit comfortably. High Quantity Office chair all the parts BIFIMA certification, more reliable and sturdy, This desk chair does include a weight limit of 250 pounds. Breathable Mesh Back Ergonomic mesh office chair has durable breathable mesh back allows air to circulate to keep you cool while leaning. Upgraded Breathable Sponge The soft and moderate sponge cushion will fit the sitting position of human thigh for a long time,full modelling,good elastic,no variant,that would provided you a comfortable seat. Product description Breathable mesh office chair The padded mesh seat is thick and resilient. Made of high quality thick sponge and breathable mesh cloth, preventing body heat and keeping your hips and legs cool and sweat-free. Multi-function Mechanism Pneumatic controls make it easier to raise or lower the seat. The recline mode can help relax you from heavy work. This chair can support up to 250 lbs of weight. Smooth and Durable 360°Casters The PU casters provide great mobility, suitable for hard floors, carpet and more, while moving and swiveling silently is effortless. Outstanding Quality Designed and built using only high-quality materials and mechanical structure. Product Specifications Material:Mesh, High-density sponge, Metal base