SIHOO B100-GMUK Full-Mesh Office Chair, Adaptive Lumbar Support, 300 lb

The SIHOO B100-GMUK is a full-mesh office chair with adaptive lumbar support, three listed recline angles and flip-up armrests. Its mesh construction and adjustable features suit desk work, while the supplied listing contains conflicting colour, model and size details to check before ordering.

At a glance

Adaptive lumbar support is described as moving with changes in sitting position.
The feature description lists recline angles of 110°, 123° and 135°.
Full-mesh construction is presented as promoting airflow.
Flip-up armrests are described as sliding under a desk when raised.
The listing states a maximum weight recommendation of 300 Pounds.

Price

£149.97Save 21%

Reference price: ~~£189.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Three described recline angles offer distinct positions for focused work and leaning back.
Flip-up armrests can help clear space beneath a desk.
Customers report positive experiences with comfort, back support and assembly.

Technical specifications

24 specifications

Identity
Brand	SIHOO
Model	B100-GMUK

Dimensions and installation
Form factor	Upholstered
Dimensions listed	70 x 72 x 112 centimetres
Weight listed	16.1 Kilograms
Assembly required	Yes
Seat back interior height	74.9 Centimetres
Seat height	54.6 Centimetres
Seat depth	17.1 centimetres
Seat length	43.4 Centimeters
Arm height	43.5 Centimetres
Backrest width	50 Centimetres
Adjustable seat height minimum	18.3 Inches
Adjustable seat height maximum	21.9 Inches

Materials and construction
Material listed	Polypropylene
Fabric type	Mesh
Back style	Mesh back
Arm style	Foldable

Adjustability and movement
Special features	Adjustable Height, Adjustable Lumbar, Ergonomic, Head Support, Rolling
Reclining position count	3 UK
Number of height positions	5
Base movement	Swivel

Capacity and care
Maximum weight recommendation	300 Pounds
Care instructions	Wipe Clean

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: the title says grey and identifies B100, while details list white, model B100-GMUK and model number B300-XX-JP. Dimensions appear as both 72D x 70W x 131H centimetres and 70 x 72 x 112 centimetres, and the seat measurements and listed adjustment range also differ. Confirm the selected chair's colour, model and measurements. Customer feedback also reports mixed adjustability, including concerns that the chair may not tilt forward far enough.

What’s in the box

Included

Caster
Cushion
Light kit
Chair

Who is it for?

A good fit for

Desk users wanting a mesh chair with adjustable lumbar support and multiple recline positions.
Buyers who want flip-up arms to make it easier to tuck a chair under a desk.
People looking for a chair with a stated 300-pound weight recommendation.

Less suited to

Buyers who need confirmed dimensions, colour or model details without checking the selected listing.
People who require assured forward tilt, since customer feedback includes concerns about its range.

SIHOO B100-GMUK Full-Mesh Office Chair, Adaptive Lumbar Support, 300 lb · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 2,090 ratings

5 stars65%65%
4 stars21%21%
3 stars7%7%
2 stars1%1%
1 star6%6%

Customer feedback highlights comfort, perceived build quality, back support and ease of assembly. Some also report limitations with adjustability, including insufficient forward tilt. That concern is relevant because the listing describes several recline positions, but it does not establish how far the chair tilts forward. The generally positive comments may interest buyers seeking a mesh chair for desk use, while individual comfort and fit can vary.

Positive themes

Customers describe the chair as comfortable and well-built, and report positive back support.
Customers often describe assembly positively.

Negative themes

Some customers report that the chair does not tilt forward far enough.

Mixed feedback

Feedback on adjustability is mixed.

Frequently asked questions

What recline angles are described for the SIHOO B100?

The feature description lists 110°, 123° and 135°. Customer feedback includes some concern that the chair may not tilt forward far enough, so this may matter if forward tilt is important to you.

Is the chair grey or white?

The title identifies it as grey, while the details list white. Confirm the colour of the selected listing before ordering.

What dimensions should I use to check fit?

The listing gives two overall dimension sets, 72D x 70W x 131H centimetres and 70 x 72 x 112 centimetres, so confirm the measurements for the selected model.

Does the chair require assembly?

Yes. The listing states that assembly is required, and customer feedback generally describes assembly positively.