JOBOON High Back Mesh Office Managers Chair,Ergonomic Computer Desk Chair,Adjustable Headrest & Nylon Armrests,Mutifunctional Mechanism,Executive Task Chair Black Ergonomic high back home & office chair providing exceptional back support & preventing body heat and moisture build up. Tilt tension control and synchro tilt mechanism with tilt lock allow for movement or stability as needed. Built-In Lumbar Support.Paddle control mechanism allows back angle adjustment,back tilt lock and seat hight adjustment. Mesh seat and premium fabric upholstery to eliminates leg fatigue.360-degree swivel. Weight capacity is 300 pounds.Easy assembly! We provide 2-year free component-exchange.