Pressure points are what make a chair uncomfortable long before the padding wears out, and this one is contoured at three of them. The shell follows the shape of the back, wraps in at the lumbar, and curves under the hips, so weight is spread across the whole contact area instead of concentrating where the body is narrowest. Built into that shell is a lumbar support that holds the lower spine in proper alignment rather than leaving it to sag as the hours pass. The 19-inch square seat carries a thick sponge cushion that relieves pressure during long-time sitting, and the 19.5-inch backrest and seat are both faced with breathable mesh fabric that lets air move freely rather than trapping it against the body. Two controls sit under the seat: a height adjustment lever that moves the seat between 18 inches and 21 inches, and a rocking tension control that sets how far and how easily the chair tips back, which is what keeps a workday energetic rather than static. Both armrests flip up a full 90 degrees, saving a lot of space when the chair needs to tuck under a table, and 360-degree rolling casters move it easily across carpet, tile, or wood. A premium gas cylinder and a sturdy five-claw base give the whole thing a 25-inch square footprint and a rated 330 lbs capacity at 36 to 39 inches tall, on a frame that weighs 21 lbs in total. Selected materials are used throughout for enhanced seating comfort, and assembly is needed before first use.