The High Back Designer Mesh Executive Swivel Chair with Adjustable Arms offers a modern appeal with your comfort in mind. The ergonomic back design has proper curvature to support your lower back. Ventilated mesh back material allows air to circulate to keep you cool. The molded swivel seat is covered with black mesh upholstery and has leather sides. The sides of the seat and arms have white contrast stitching. Its waterfall edge is designed to relieve pressure and promote healthy blood flow to your legs. Raise and lower the seat using the pneumatic seat height adjustment lever. Turn the tilt tension adjustment knob to increase or decrease the amount of force needed to rock or recline. Lock the seat in place by pushing the tilt lock mechanism lever inward. When ready to upgrade your office seating, purchasing this ergonomically designed swivel desk chair will not disappoint. Modern Ergonomic Executive Task Office Chair with Height Adjustable Arms High Back Design with breathable mesh material Built-In Lumbar Support Tilt Lock Mechanism rocks/tilts the chair and locks in an upright position Tilt Tension Adjustment Knob adjusts the chair's backward tilt resistance Padded Mesh Upholstered Seat with CAL 117 Fire Retardant Foam Embellished white stitching on padded arms and seat Waterfall Seat reduces pressure on your legs 360 Degree Swivel Seat with Pneumatic Seat Height Adjustment 5-Star Nylon Base with Dual-Wheel Casters