Headrest height and angle adjustment - multi position headrest height adjustable with angle tilt feature for optimum head to neck support. Adjustable lumbar support - height and depth adjustable lumbar support with a knob locking system to provide adequate lower back support 3d armrest adjustment - arm height, arm cap (front-back) and pivot inwards adjustments that allows your elbows and forearms to be supported by the arm rests. By properly aligning the elbow and therefore wrist on the keyboard, many repetitive wrist and hand injuries can be avoided multi angle locking backrest tilt mechanism - multi angle backrest locking tilt mechanism with body weight tension adjustments to smoothen the seating experience. Seat height and seat slide adjustment - the sliding seat, enlarges and shortens the seat depth and thereby offers more support in the lumbar region. Seat slide adjustment is also useful in getting adequate thigh support for a 90 degree thigh to feet posture. Mesh material (back) - the mesh material used is nylon for its extra ability to stretch and silk finish seat matrerial - energy absorbing foam with soft mesh upholstery to absorb heat created by continuous seating at one place. Fibre packing placed under the seat to enhance the look and finish of the chair. Frame material - nylon plus glassfiber frame which offers exceptional toughness to the product chair base - 5 prong steel base with nylon castors hydraulic - class 4 heavy duty gas lift for seat height adjustment bearing capacity 200kgs inch the adjustable lumbar support attached to the chair regulates the height of the lumbar support independent of the seat back. It is easily adjustable to enhance comfort. Ergonomic adjustable arms - the 3 way adjustable armrests are designed to move up-down, front-back, and left-right. The armrests support the elbows, forearms, and help prevent the shoulders from slouching, shoulder pain and neck cricks multilock mechanism with seat sliding tested as per bifma standards