Contemporary Office Chair Black LeatherSoft Upholstery High Back Design with Headrest 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 CAL 117 Fire Retardant Foam Waterfall Swivel Seat reduces pressure on your legs Pneumatic Seat Height Adjustment Padded Arms Heavy Duty Titanium Nylon Capped Metal Base with End Caps Dual Wheel Casters LeatherSoft is leather and polyurethane for added softness and durability