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SIHOO M18 Ergonomic Office Chair, High Back Mesh Desk Chair with Adjustable Headrest & Lumbar Support, 330lbs Capacity Computer Chair with 2D Armrests & Wide Cushion, Tilt Lock, for Home Office-Black
SIHOO

SIHOO M18 Ergonomic Office Chair

Bottom line: The SIHOO M18 Ergonomic Office Chair ($139.64 on Amazon as of 2026-10-06): 330 lb (150 kg) capacity, BIFMA-tested and 1136 kg static pressure rated; main trade-off: 2D armrests only — no forward/back or pivot adjustment.

$139.64

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Buy on Amazon — $139.64 Compare to similar home & kitchen

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 330 lb (150 kg) capacity, BIFMA-tested and 1136 kg static pressure rated
  • ✓ Adjustable headrest plus adjustable lumbar, not a fixed one-piece back
  • ✓ 3-year warranty with free replacement parts from SIHOO
  • ✓ Non-pattern mesh backrest for airflow during long desk sessions

Cons

  • ✗ 2D armrests only — no forward/back or pivot adjustment
  • ✗ Sized for 5'6" to 6'2", so shorter or taller users lose headrest fit
  • ✗ Eight-step self-assembly required, no pre-built option
  • ✗ Tilt lock holds angle but SIHOO lists no tension-adjust range

Manufacturer description

The SIHOO M18 is a high-back mesh office chair built around four support points — head, back, hips, and hands — with an adjustable headrest, adjustable lumbar support, seat-height adjustment, and 2D armrests. SIHOO sizes it for people between 5'6" and 6'2", so taller users get headrest travel that actually reaches the neck rather than the shoulder blades. The backrest uses a flexible non-pattern mesh that keeps airflow moving across your back through long sessions, and a tilt lock holds your preferred recline angle instead of letting the chair drift. Load capacity is 330 lbs (150 kg), backed…

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SpecPicks Verdict

SpecPicks scored SIHOO M18 Ergonomic Office Chair using a rating × review-volume × price-fit model applied to published specs and reviews across the home & kitchen category. SIHOO's home & kitchen lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for home & kitchen of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How much weight can the SIHOO M18 hold?

It supports up to 330 lbs (150 kg). SIHOO states the chair passed BIFMA testing and a 1136 kg static pressure test.

Is the SIHOO M18 tall enough for someone over six feet?

SIHOO lists the M18 as suitable for people 5'6" to 6'2" tall. Above 6'2" the adjustable headrest may not reach your neck properly.

What warranty comes with this chair?

SIHOO provides a 3-year warranty with free replacement parts, plus free returns and refunds within 30 days for faulty or quality-related issues.

How hard is the SIHOO M18 to assemble?

SIHOO says assembly takes eight steps using the included instructions. No assembly time is published, so plan for a standard flat-pack chair build.

Are the armrests adjustable on the SIHOO M18?

Yes, it has 2D armrests. Seat height, headrest, lumbar support, and back support are also adjustable, and a tilt lock fixes your recline angle.

Key Features

  • 【ERGONOMICE OFFICE CHAIR】- The ergonomic chair provides 4 support points (head/back/hip/hands) and proper lumbar support. SIHOO designs ergonomic chairs to meet different needs, with seat height, headrest adjustment, lumbar support and back support adjustment, suitable for long sitting and reduce your pain. Suitable for people 5'6" to 6'2" tall.
  • 【For Home and Work】 SIHOO chairs can be applied in different scenarios according to the needs of different consumers in needs. Can be used as student office chairs, computer chairs, ergonomic chairs, desk chairs, gaming chairs; not only can sit comfortably, but also save money;
  • 【Breathable Mesh】 Mesh Office Chair Premium Backrest features flexible non-pattern mesh fabric while keeping your back cool and comfortable, allowing you to sit focused and relaxed at the same time.
  • 【High Quality & Easy Assembly】This home office desk chair passed the BIFMA test and the 1136kg static pressure test. Our ergonomic office chair can support up to 150kg. Simple instructions allow anyone to put the chair together in eight easy steps.
  • 【Satisfaction Guaranteed】Customer satisfaction is our first priority. Free returns and refunds within 30 days if the SIHOO office chair is faulty or if there are any other quality-related issues. We promise to provide free replacement parts during the 3-year warranty period. If you encounter any problems, please contact us and we will do our best to find a satisfactory solution.

Full Specifications

SizePack of 1
BrandSIHOO
ColorBlack
ShapeRectangular
Weight1136kg
PatternSolid
TiltingYes
MaterialMetal, Polyester, Polypropylene
Arm StyleWith arms
Leg StyleTapered Leg
Room TypeOffice
Back StyleSolid Back
Item Depth21 inches
Model NameM18
Seat Depth18 inches
Style NameModern
Unit Count1.0 Count
Form FactorRecliner
Is FoldableNo
Seat Height20 Inches
Full listing titleSIHOO M18 Ergonomic Office Chair, High Back Mesh Desk Chair with Adjustable Headrest & Lumbar Support, 330lbs Capacity Computer Chair with 2D Armrests & Wide Cushion, Tilt Lock, for Home Office-Black

Ready to buy?

SIHOO M18 Ergonomic Office Chair, High Back Mesh Desk Chair with Adjustable Headrest & Lumbar Support, 330lbs Capacity Computer Chair with 2D Armrests & Wide Cushion, Tilt Lock, for Home Office-Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $139.64

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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SIHOO M18 Ergonomic Office Chair, High Back Mesh Desk Chair with Adjustable Headrest & Lumbar Support, 330lbs Capacity Computer Chair with 2D Armrests & Wide Cushion, Tilt Lock, for Home Office-Black
$139.64
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