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SIHOO

SIHOO Doro-C300 Ergonomic Office Chair: the downsides first

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#6 of 8
$$MeshScore 3.2/5
14%
of Amazon ratings are 1–2 stars
(checked 2026-10-10)
Small sample (about 1,329 ratings); the listing pools black and white versions.

An all-mesh chair with a headrest and 3D arms for far less than premium brands, but its lumbar only moves when you recline, the arms slide out of place, and the narrow seat and short max height don't suit bigger or taller users.

Top complaints

  • Lumbar not independently adjustable

    Tom's Guide says the lumbar stays fixed while upright and only moves with you when reclining, which took getting used to. Amazon's summary notes some owners say the backrest doesn't lock in place properly.

  • Armrests slide too easily

    Tom's Guide found the arms get knocked inward or outward when pushing the chair in, so they needed constant readjusting; there's no lock.

  • Narrow seat, low max height, more assembly

    Tom's Guide says the narrow seat and 22-inch max seat height may not suit taller or wider users. Assembly took its reviewer about 30 minutes because even the wheel base comes unassembled.

What owners love

  • Breathable all-mesh design

    Tom's Guide praises the mesh seat, back and headrest for airflow and its eye-catching frame.

  • Adjustable headrest and 3D arms

    Tom's Guide notes 3D armrests that pivot 75 degrees and a headrest with eight heights and two tilts. Amazon owners praise the arm angle and height adjustment.

  • Owners report all-day support

    Amazon's summary says owners find it supportive for long hours, with some saying they can go a full workday without back discomfort, and call it good value.

Good for
  • Shorter users
  • A mesh chair with a headrest on a mid budget
  • Hot rooms

Scores (tap for why)

  • Comfort3.5
    Why 3.5?Comfortable all day in Tom's Guide's month of use, though the mesh felt plasticky at first and the seat is narrow.
  • Adjustability3.5
    Why 3.5?3D arms and a multi-position headrest, but no manual lumbar depth and arms that don't lock sideways (Tom's Guide).
  • Back support3.0
    Why 3.0?Lumbar height has four steps but is otherwise fixed until you recline (Tom's Guide); Amazon owners report good support.
  • Easy assembly3.0
    Why 3.0?About 30 minutes for an experienced tester, 45-60 minutes for others, with small one-page instructions (Tom's Guide); Amazon owners call it easy.
  • Durability & warranty3.0
    Why 3.0?No creaks or shifting in testing, but only a 3-year warranty (Tom's Guide).

What experts say

  • Tom's Guide: Comfortable, well-priced all-mesh chair with an adjustable headrest; the non-adjustable lumbar, narrow seat, sliding armrests and extra assembly are the downsides.
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