Designed using ergonomic principles, the Alera EB-W Series Pivot Arm Multifunction Mesh Chair - Black/Aluminum offers support everywhere you need it to ensure your comfort. You can swing the arms inwards and outwards as well as up and down to get arm support when you require it and more room when you don't. The synchro-tilt mechanism allows you to recline comfortably while keeping your feet on the floor, and the waterfall seat edge enhances circulation by placing less pressure on the backs of your legs. A micro mesh back provides cooling benefits while stretching to fit the contours of your back. Finishing the design is a chromed aluminum base with five smooth-rolling caster wheels.