ERGONOMIC DESIGN: Breathable Mesh design backrest with lumbar support will help you keep in a right position during long time working. The seat height of the chair can be simply adjusted by a little push-up/press down at the lever under the seat according to your needs. SOFT & COMFORT SEAT: High-density cushion for seat, & breathable mesh material allows air to circulate to keep you cool while sitting. TILT MODE: By simply pushing the lever or pulling it out, the chair can be tilted between 90-135 degrees and leaned backward. A tilt torsion control knob under the seat is provided to adjust the rocking. TECH SPECIFICATIONS: Frame Material: Glass Filled Nylon Structure with Breathable Mesh | Color: Black | Size: High Back | Swivel: 360 swivel | Knee-tilt Mechanism | Gas-lift : Class 4 | Base: Nylon Base| Castors: Nylon Wheels | Fixed Armrest | Maximum Weight Capacity:- Upto 110 kgs | Height Suitability:- 5ft.2" - 6ft"