Taiwan mesh material: taiwan mesh material used is known for its extra ability to stretch and thick wire finish to provide toughness. seat material: energy absorbing soft mesh upholstery to absorb heat created by continuous seating at one place. the advantage of mesh seat can be understood after long hours use, it provides ventilation to hips and thighs that helps in avoiding rashes and other problems. headrest height and angle adjustment : multi position headrest height adjustable with angle tilt feature for optimum head to neck support. adjustable lumbar support : height adjustable lumbar support system to provide adequate lower back support. seat height & seat slide adjustment: the sliding seat, enlarges and shortens the seat depth and thereby offers more support in the lumbar region. 2d armrest adjustment: arm height adjustments that allow 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. frame material : nylon + glass fiber frame which offers exceptional toughness to the product, chair base : 5 prong steel base with nylon castors, hydraulic : heavy duty gas lift for seat height adjustment bearing capacity 150kgs. seat slide adjustment is also useful in getting adequate thigh suppo