Boss - BOPB8871BKGY Executive Chair with hinged arms is beautifully upholstered in Caressoft for the kind of comfort and durability required for a long day at the office. It features a designer, stitched back cushion and pivoting hinge arms that allow the seat and back to move independently in tandem with the two-to-one synchro-tilt mechanism and adjustable tilt tension control. Seat tilt locks in any position within the tilt range for a truly personalized seating experience.