SIHOO
SIHOO B100 Office Chair, Comfy Ergonomic Office Chair, High Back Computer Chair with Adaptive Lumbar Support & Wide Headrest, Flip-up Armrests, Swivel Desk Chair for Long Hours, Grey
Very Good
In stock on Amazon.com
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FLEXISPOT
FLEXISPOT ErgoX-PRO Ergonomic Office Chair Black – Cloudtech Cushion, 5D Lumbar, 7D Armrests, 4D Headrest, 551LBS Capacity – Office, Gaming, Home
Excellent
- 4D arms
- Headrest
- 551 lb capacity
- Seat depth adjustment
$399.99
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: 59/100
Adjustability 24/40
Armrests10/104D armrests: 10/10
Seat height4/6adjustable: 4/6
Seat depth5/5seat depth adjustment: 5/5
Lumbar adjustment0/7Not listed by the seller
Recline2/2recline to 135 degrees: 2/2
Tilt lock3/3tilt lock: 3/3
Tilt tension0/3Not listed by the seller
Advanced tilt0/4Not listed by the seller
Support 21/30
Lumbar support12/12lumbar support: 12/12
Upper back support4/4headrest: 4/4
Headrest adjustment0/2Not listed by the seller
Cushion5/5mesh seat: 5/5
Seat edge0/3Not listed by the seller
Breathable back0/4plastic back: 0/4
Build 14/30
Warranty0/9Not listed by the seller
Weight capacity6/6551 lb capacity: 6/6
Certifications0/5Not listed by the seller
Base3/3aluminum base: 3/3
Gas lift2/2Class 4 gas lift: 2/2
Owner rating3/54.3 stars from 393 reviews: 3/5
Comfort Index
Comfort Index: 61/100
Seat cushion14/20
Cushion thicknessNot listed by the seller
Recline15/15
Breathable back0/15
Headrest10/10
Armrests10/10
Owner rating12/25
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 | Yes |
| Seat cushion | Mesh |
| Cushion thickness | Not listed by the seller |
| Back material | Plastic |
| Backrest height | Not listed by the seller |
| Backrest width | Not listed by the seller |
| Armrests | 4D adjustable |
| Lumbar support | Dynamic |
| Lumbar adjustments | Not listed by the seller |
| Headrest | Yes |
| Max recline | 135 degrees |
| Tilt mechanism | Not listed by the seller |
| Base material | Aluminum |
| Casters | Not listed by the seller |
| Gas lift | Class 4 |
| Weight capacity | 551 lb |
| Chair weight | Not listed by the seller |
| Overall height | Not listed by the seller |
| Warranty | Not listed by the seller |
| Certifications | Not listed by the seller |
What We Like
- The 551 lb rating is among the highest weight capacity ratings in its category.
- Recline reaches 135 degrees, one of the deeper recline angles in its category.
- The seat depth adjusts, the cushion is mesh and the gas lift is listed as Class 4.
Watch Out For
- The listing gives the back material as nylon and does not say mesh, while the cushion is mesh.
- The listing does not state the lumbar adjustments, the headrest adjustments, the tilt mechanism or a warranty term, so much of the adjustability is described only in the product title.
- It is one of the pricier chairs in its category, so the case for paying more rests on the load rating and recline.
At a Glance
Recline to 135 degrees, seat depth adjustment and a 551 lb rating: the ErgoX-PRO leads with load and lean, adding a dynamic lumbar, a headrest and 393 reviews averaging 4.3.
Who This Chair Is For
- Sitters who recline often, with a listed angle of up to 135 degrees.
- People who need to match seat length to their legs, since the seat depth adjusts.
Who Should Look Elsewhere
- Anyone who wants a mesh back, because the listing gives the back material as nylon and does not say mesh.
- Shoppers who want a deep review record, since the listing shows 393 reviews at 4.3.
Seat slide and long recline: how the ErgoX-PRO fits you
Seat depth is listed as adjustable, so the seat can be matched to your leg length. The recline goes up to 135 degrees. The lumbar is described as dynamic, though the listing does not state whether it adjusts in height, depth or tension, and the headrest adjustments are not stated either. The cushion is listed as mesh and the back as nylon.
Alternatives to Consider
Why consider: Has 3,522 reviews and a 3-year warranty, against 393 reviews and no stated warranty here.
GABRYLLY
GABRYLLY Ergonomic Office Chair with Footrest, 135° Reclining Desk Chair with Adjustable Lumbar Support,3D Armrest,Headrest & Large Steel Base, 300LBS Heavy Duty Mesh Chair
Very Good
In stock on Amazon.com
Why consider: Matches the 135 degree recline and states a height-adjustable lumbar, which the ErgoX-PRO listing does not state.
Frequently Asked Questions
Can I slide the seat forward and back?
Yes, seat depth is marked adjustable, so you can match the seat to your leg length.
What gas lift does it use?
The gas lift is listed as Class 4.
Is the back mesh?
The listing gives the back material as nylon and does not say mesh; the cushion is mesh.
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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.