SIHOO B100 Mesh Ergonomic Office Chair, Adjustable Lumbar

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Product guide

SIHOO B100 Mesh Ergonomic Office Chair, Adjustable Lumbar

The SIHOO B100 ergonomic office chair pairs a mesh build with adjustable lumbar support, seat height and headrest. Its three lockable recline positions offer several ways to change posture, while the listing’s conflicting model and size details make it important to confirm the exact chair configuration before purchase.

At a glance

The listing describes lumbar support that moves with the user and an adjustable headrest.
Seat height is listed as adjustable from 18.3 to 21.9 inches.
Three lockable recline angles are claimed: 110°, 125° and 135°.
The product description claims a breathable mesh back and a widened seat cushion.
A maximum weight recommendation of 300 pounds is listed.

Price

$159.97Save 27%

Reference price: ~~$219.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Adjustable seat height, headrest and lumbar support give buyers several fit and posture options.
Three lockable recline positions support changing between upright work and leaning back.
Mesh back construction may suit buyers who prefer an airy backrest.

Cons

The listing recommends a maximum load of 300 pounds, which may rule it out for some buyers.

Technical specifications

27 specifications

Identity
Brand	SIHOO
Model	B100-M102
Material listed	Mesh

Dimensions and installation
Form factor	Armchair, Desk Chair, Recliner Chair
Dimensions listed	27.56 x 28.35 x 44.09 inches
Weight listed	16.1 kg
Product dimensions	28.3"D x 27.6"W x 51.6"H
Seat height adjustment	18.3 inches to 21.9 inches
Seat depth	17.1 inches
Seat back interior height	29.5 inches
Arm height	25.4 inches
Chair backrest width	19.7 inches

Materials and construction
Frame material	Polypropylene
Fill material	Polyester, Polystyrene
Upholstery fabric	Nylon, Polyester
Color	Grey
Maximum weight recommendation	300 pounds

Adjustments and use
Features	Adjustable Headrest, Adjustable Height, Adjustable Lumbar, Ergonomic, Rolling
Reclining positions	3 Position
Height positions	5
Arm style	Flip-up
Base movement	Swivel
Recommended uses	Computer, Drafting, Gaming, Office, Reading, Relaxing, Sleeping, Video Game
Indoor/outdoor usage	Indoor
Surface recommendation	Hard Floor, Carpet

Care and support
Care instructions	Wipe Clean
Manufacturer warranty description	3-year free parts replacement.

What to know before buying

Listing details to confirm

Listing details are contradictory or inconsistent: the model is named B100-M102 but another field gives model number B300-XX-JP, and its dimensions are listed both as 27.56 x 28.35 x 44.09 inches and 28.3"D x 27.6"W x 51.6"H. Recline angles, adjustable seat-height range and a 300-pound limit appear in feature text rather than the compact details, so confirm these specifications and the selected configuration before ordering. The item highlight says without footrest, while the contents list includes an LED light, so confirm the package contents as well.

What’s in the box

Arm padIncluded
CasterIncluded
CushionIncluded
LED lightCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Desk and home-office users wanting adjustable lumbar support, headrest and seat height.
People who prefer a mesh-backed chair and want multiple lockable recline positions.
Buyers whose desk setup works with the listed 18.3-to-21.9-inch seat-height range.

Less suited to

People needing a chair with a footrest, which the listing highlight says is not included.
Buyers whose required capacity exceeds the listed 300-pound recommendation.
Anyone who needs confirmed model or dimensions before purchase without first clarifying the listing inconsistencies.

SIHOO B100 Mesh Ergonomic Office Chair, Adjustable Lumbar · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 3,920 ratings

5 stars67%67%
4 stars16%16%
3 stars4%4%
2 stars3%3%
1 star10%10%

Customer feedback highlights perceived strengths in quality, lower-back support, ergonomics, sturdiness and appearance, with some customers describing the chair as suitable for long work hours. That aligns with the listing’s mesh construction and adjustable lumbar and headrest features, though those product claims do not guarantee an individual fit. Assembly and adjustability experiences are mixed, including reports of confusing instructions and armrests that flex too much. These concerns matter if straightforward setup or firm arm support is a priority.

Positive themes

Customers describe the chair as well made and supportive for the lower back.
Some feedback praises its ergonomics, sturdy feel and appearance.

Mixed feedback

Assembly experiences vary, with some finding it easy and others describing confusing instructions.
Feedback on adjustability varies, and some customers report excessive armrest flex.

Frequently asked questions

What is the listed seat-height adjustment range?

The listing gives a range of 18.3 to 21.9 inches, but buyers should confirm it for the selected configuration because listing details are inconsistent.

Does the chair include a footrest?

The item highlight describes the chair as without a footrest. The supplied package information does not list one.

What recline positions are described?

Feature text claims three lockable angles of 110°, 125° and 135°. Confirm these details against the selected listing before purchase.

What does customer feedback say about assembly and adjustments?

The supplied feedback describes assembly experiences as mixed, and opinions on adjustability vary. Some comments also mention armrests flexing too much.