1. Elastic mesh seat and back breathe and will never "bottom out" like a traditional foam cushion office chair. 2. Incredible wear and durability of elastic mesh is unequaled. 3. Sturdy and strong all steel base for a firm foundation. 4. Built-in flexing lumbar section providing steady and constant support to lower back. 5. Advanced mechanism keeps front of chair from lifting while in recline position, eliminating pressure on the back of legs. 6. Waterfall front seat edge. 7. Soft yet tough polyurethane arm pads for forearm comfort. 8. Comes standard with dual wheel carpet casters. 9. 5-Year Warranty 10. Assembly Instructions Video1. 2:1 back to seat synchro tilt with infinite lock allows ideal user angle. 2. Tilt tension adjusts easily for different weight users. 3. 3-way adjustable armrests adjust fore/aft, up/down and even pivot inward to meet a wide variety of user preferences.1. Measures 26"W x 26"D x 47"-51"H overall. 2. Seat measures 19-1/2"W x 20"D. 3. Backrest measures 20"W x 24"H (headrest adds 7-8" in height, not included in measurement) 4. Seat height range is 18" - 22"H from top of seat to floor.4. Height and angle adjustable elastic mesh head/neck support. 5. Seat swivels 360 degrees. 6. Gas lift seat height adjustment. 7. Meets or exceeds ANSI/BIFMA standards.5. Space between arms: 21"W 6. Distance from top of seat to top of armrests: 5-3/4 – 8-3/4"H 7. Arm Pad Measurements: 9-1/2"L x 3-1/2"W 8. Base Diameter: 26"