SIHOO
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
Good
In stock on Amazon.com
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GABRYLLY
GABRYLLY Ergonomic Office Chair, Big and Tall Mesh Chair with Lumbar Support, 3D armrest - 215° Rotation, Adjustable Headrest & Soft Seat, Durable Computer Chair 350LBS for Work Gaming
Very Good
- Mesh back
- 3D arms
- Headrest
- 350 lb capacity
$217.00$255.50
You save $38.50 off the list price
In stock on Amazon.com
Check PriceSpecs verified August 2026
Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.
Ergo Score Breakdown
Ergo Score: 54/100
Adjustability 17/40
Armrests8/103D armrests: 8/10
Seat height4/6adjustable: 4/6
Seat depth0/5Not listed by the seller
Lumbar adjustment0/7Not listed by the seller
Recline2/2recline to 120 degrees: 2/2
Tilt lock3/3tilt lock: 3/3
Tilt tension0/3Not listed by the seller
Advanced tilt0/4Not listed by the seller
Support 18/30
Lumbar support8/12lumbar support: 8/12
Upper back support4/4headrest: 4/4
Headrest adjustment2/2headrest adjustment: 2/2
Cushion0/5Not listed by the seller
Seat edge0/3Not listed by the seller
Breathable back4/4mesh back: 4/4
Build 19/30
Warranty3/92-year warranty: 3/9
Weight capacity6/6350 lb capacity: 6/6
Certifications4/5BIFMA: 4/5
Base2/3steel base: 2/3
Gas lift1/2Class 3 gas lift: 1/2
Owner rating3/54.4 stars from 551 reviews: 3/5
Comfort Index
Comfort Index: 59/100
Seat cushionNot listed by the seller
Cushion thicknessNot listed by the seller
Recline10/15
Breathable back15/15
Headrest10/10
Armrests10/10
Owner rating14/25
Specifications
| Seat height range | Not listed by the seller |
|---|---|
| Seat width | Not listed by the seller |
| Seat depth | Not listed by the seller |
| Seat depth adjustable | Not listed by the seller |
| Seat cushion | Not listed by the seller |
| Cushion thickness | Not listed by the seller |
| Back material | Mesh |
| Backrest height | Not listed by the seller |
| Backrest width | Not listed by the seller |
| Armrests | 3D adjustable |
| Lumbar support | Yes |
| Lumbar adjustments | Not listed by the seller |
| Headrest | Yes |
| Max recline | 120 degrees |
| Tilt mechanism | Not listed by the seller |
| Base material | Steel |
| Casters | Not listed by the seller |
| Gas lift | Class 3 |
| Weight capacity | 350 lb |
| Chair weight | Not listed by the seller |
| Overall height | Not listed by the seller |
| Warranty | 2 years |
| Certifications | BIFMA |
What We Like
- Arm adjustment covers height, depth and pivot, which is the 3D class.
- A BIFMA certification is named and the base is steel.
- Its Ergo Score of 54 ties for tenth in its category, and its build sub-score ties for fifth.
Watch Out For
- Seat depth adjustment and a tilt tension control are not stated, and the lumbar is listed as present without any height or depth adjustment being stated.
- Cover runs 2 years, which puts it in the lower half of the warranties the category states.
At a Glance
Of the two Big and Tall 3D-arm listings, this is the one whose title names no colour. It states the same 3D arms, adjustable headrest and 120 degree recline, with a Comfort Index of 59.
Who This Chair Is For
- Buyers who want to set the arms to their desk in three directions and still have a headrest to lean into.
- Sitters who want a mesh back on a steel base with a Class 3 lift behind it.
Who Should Look Elsewhere
- Shoppers who need a stated cushion type or thickness, because the listing does not state one.
- People above 350 lb, which is as far as the stated rating goes.
Which controls the colourless 3D-arm GABRYLLY actually lists
Tilt reaches 120 degrees and can be held at 3 lock positions. The headrest moves in height and angle, and each arm in height, depth and pivot. Underneath sit a steel base and a Class 3 gas lift behind a mesh back.
Alternatives to Consider
Why consider: Lists tilt tension adjustment, which this listing does not state, and 3 years of cover against 2 here, though its arms are classed 2D against 3D.
VASAGLE
VASAGLE Ergonomic Mesh Office Chair with Adjustable Lumbar Support and Headrest, 90-105° Tilt Function, Wide Seat, Flip‑Up Armrests, Computer Desk Chair for Home Office, Ink Black UOBN044BH01S
Good
In stock on Amazon.com
Why consider: Is one of the more affordable chairs in the category and lists flip-up arms with a headrest that adjusts in height.
Frequently Asked Questions
How many reviews support the rating?
The listing shows 551 reviews averaging 4.4.
How does this listing differ from the grey one?
In the specs it does not: both state the same arms and the same rating. The grey sibling has Grey in its title and this one carries no colour.
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Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.