Giantex Mid-back Ergonomic Mesh Swivel Adjustable Computer Office Desk Task Chair Ergonomically Designed  Executive high-back chair features a mesh back chair, mesh fabric seat and ergonomically designed high back for natural curvature of a person's back. 360 Degree Swivel  Heavy duty chair base with castors for greater stability, 360 degree swivel wheel and chair can be more flexible in the working space. Adjustable Height The pneumatic gas lift easily and effectively adjusted from seat to desk on workstation, adjustable seat height for best and comfortable sitting posture. Breathable Black Mesh This task chairs breathable mesh back conforms to your upper body for added support to keep you cool and comfortable while you work Easy to Assemble  The Giantex high back computer chair is easy to assemble and the all required accessories are included. You can quickly assemble the item and use it in a clear and easy-to-understand manual.