Is the Sihoo M59AS good for long workdays?

Yes. The dual-section backrest, adjustable lumbar support and breathable mesh are designed for full-day sitting. The saddle-shaped seat spreads weight, though the mesh is firmer than foam.

How is it different from the Sihoo M18?

The M59AS adds a dual-jointed headrest and 3D flip-up armrests, and uses a two-section backrest. The M18 is a simpler mesh chair with a single-piece back and fewer adjustments.

Do the armrests really flip up?

Yes. The 3D armrests fold upward so the chair can push under a desk, which helps in small home offices.

Does it have a headrest?

Yes. It has a dual-jointed headrest that adjusts for height and angle to support the neck.

What is the chair made of?

The back, seat and headrest are mesh over a frame, with an integrated coat hanger on the back. The mesh is breathable and easy to wipe clean.

Who is it not right for?

Shoppers who want a thick foam seat, a seat-depth slider or a heavy-duty big-and-tall build should look at other chairs. The M59AS is aimed at standard-size desk work.