A Mac desk setup usually starts with the computer, maybe a display, and a few favorite accessories. But the chair deserves a place on that upgrade list, too. The Sihoo B300 Pro puts adjustability at the center of that setup. It combines 4D Micro Fit Lumbar Support, 6D All-around Armrests, backrest and seat depth adjustments, an intelligent recline system, and breathable mesh.

Start with the lumbar support. Sihoo's 4D Micro Fit system lets you adjust its height and depth, with movement designed to follow your back as you shift position. The B300 Pro's 6D All-around Armrests bring that same flexibility to your arms. They rotate, adjust, and flip up, giving you options as you move between desk work and a more relaxed position.

Backrest and seat depth adjustments add another layer of customization. The backrest offers 2.2 inches of height adjustment, while the seat depth ranges from 16.5 to 18.5 inches. When it's time to lean back, the intelligent recline system uses a weight-adaptive mechanism to adjust resistance automatically. Sihoo also includes three lockable recline angles: 105, 120, and 135 degrees. Rounding out the design is premium breathable mesh.

The black Sihoo B300 Pro without a footrest is priced at $269.99 under this promotion. Use code SIHOO9to5M to bring the price to $253.79.