SIHOO Ergonomic Office Chair B100 PRO

Long desk sessions can leave your lower back and shoulders feeling stiff, especially when a chair offers little support as you change positions. The SIHOO B100 PRO pairs adaptive lumbar support with a breathable mesh back and seat, plus a retractable footrest for breaks. Its adjustable armrests and recline settings add flexibility for work, study, or gaming. One practical drawback: the product details don’t provide chair dimensions, so it’s harder to judge the fit for your desk and body before buying.

Technical details

The B100 PRO uses a dual-back design with elastic lumbar support intended to move with you as you lean forward or sit upright. Both the back and seat are mesh, which promotes airflow during extended sessions. A wide headrest is designed to support the neck, while the padded seat cushion spreads contact across a wider area.

The 4D armrests can be adjusted, rotated, or flipped up. The chair also has a retractable footrest and a lockable recline with three listed angles: 110°, 125°, and 135°. The product name gives a 300 LBS rating. These details make it more versatile than a basic desk chair with fixed arms and no recline, though they don’t tell you the seat dimensions or how the chair will fit a particular workspace.

Getting the most from it

For focused work, set the armrests to support your arms while typing and use the lumbar support as you sit upright. When a call ends or you switch to a break, the recline and pull-out footrest offer a different position without moving to another seat. Flip-up arms may also help when you need to slide the chair closer to a desk.

It makes sense if you want one chair for desk work and occasional reclined breaks, and you value mesh across both the seat and back. Not the best choice if you need a chair with published dimensions to confirm a precise fit, or if a simpler fixed chair would meet your needs. The feature list does not specify seat-height adjustment or assembly details, so those points may matter if you have particular setup requirements.

Usage tips

Give the footrest room to extend before settling in, and try the recline positions with your desk area clear. During typing, keep the chair upright enough to reach your work comfortably, save the more reclined settings for calls, reading, or a break. Adjust the armrests to your posture, then flip them up when you need more clearance under the desk. Since no chair dimensions are provided, assess the available space at your desk without that measurement only with care.

Before you decide

Does the chair include a footrest? Yes. It has a retractable footrest for stretching out during breaks.

How many recline angles are listed? Three: 110°, 125°, and 135°. The recline is described as lockable.

Can the armrests move? Yes. They are described as 4D and can be adjusted, rotated, or flipped up.

Final verdict

The B100 PRO is aimed at buyers who want more than a basic mesh task chair: it combines adaptive lumbar support and adjustable arms for desk use with a footrest and multiple recline positions for downtime. That combination is useful if you expect to switch between working upright and relaxing in the same chair. The missing dimensions are the key trade-off, if a close fit is essential, a chair with published measurements gives you a surer basis for deciding. If those measurements aren’t a deciding factor and the listed features match your routine, this model’s work-and-break setup is the main reason to consider it.