Office Chair, Adjustable Height, Swivel, Ergonomic, Armrests, Contemporary & Modern - BlackHigh back design with perforated upholstery for improved airflow and ventilation Extra tall backrest and integrated headrest offer superior neck and upper back support Adjustable height and tilt back mechanism allow personalized seating position Flip up armrests provide flexibility for different postures and desk heights 360 degree swivel and hooded casters ensure smooth mobility across various surfaces Conforms to BIFMA standards for durability and