# SIHOO B100-GMUK Full-Mesh Office Chair

The SIHOO B100 office chair \(model B100-GMUK\) combines a full-mesh design with adaptive lumbar support, three recline angles and flip-up armrests. Its listed 300-pound weight recommendation and adjustable headrest suit desk work and reclining, while the reported difficulty tilting forward is worth considering if that movement matters to you.

- [Original product page](https://bargainpostbox.co.uk/product/sihoo-b100-gmuk-full-mesh-office-chair)
- [View offer](https://bargainpostbox.co.uk/visit/sihoo-b100-gmuk-full-mesh-office-chair)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: SIHOO
- Model: B100-GMUK
- Category: Home & Kitchen > Furniture > Chairs & Armchairs
- Price: 139.99 GBP
- Previous price: 189.99 GBP
- Discount: 26%
- Price checked: 2026-11-12T18:13:47.459Z
- Rating: 4.4 / 5
- Reviews: 2090

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Adaptive lumbar support is described as moving with the sitter rather than locking the back into one position.
- The listing specifies recline angles of 110°, 123° and 135° and a 2D headrest.
- Full-mesh construction is presented as allowing airflow, with flip-up arms that can slide under a desk.
- The listing gives a maximum weight recommendation of 300 Pounds.

## Pros

- Three stated recline angles provide distinct upright, conversational and more reclined positions.
- Flip-up armrests can make it easier to move the chair under a desk when not in use.
- Customers report comfortable seating, back support and straightforward assembly. These are customer impressions, not performance guarantees.

## Cons

- Some customers report that the chair does not tilt forward far enough, which may matter for buyers who rely on forward tilt.

## Specifications

### Identity
- Brand: SIHOO
- Model: B100-GMUK
### Dimensions and installation
- Form factor: Recliner
- Dimensions listed: 70 x 72 x 112 centimetres
- Weight listed: 14.55 Kilograms
- Assembly required: Yes
### Materials and capacity
- Material listed: Polypropylene
- Seat material: Mesh
- Maximum weight recommendation: 300 Pounds
### Adjustability and movement
- Reclining positions: 3 Position
- Arms: Flip-up
- Lumbar support: Adjustable
### Chair details
- Colour: Black
- 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
- Care instructions: Wipe Clean

## Before you buy

- Listing details are inconsistent: the model name is B100-GMUK but the model number is B300-XX-JP, and the stated dimensions are 72D x 70W x 131H centimetres in one field versus 70 x 72 x 112 centimetres in another. Seat-height information also differs between 54.6 Centimetres and an adjustable range of 18.3 Inches to 21.9 Inches. Confirm the exact variant and measurements before buying. The manufacturer contents list also names a light kit, which is unusual for a chair, so check the selected listing's package details.

## In the box

- Caster (Included)
- Cushion (Included)
- Light kit (Check selected pack): Named in the contents list, but unusual for a chair. Confirm it is included with the selected listing.
- Chair (Included)

## A good fit for

- Desk workers who want mesh seating, adjustable lumbar support and multiple recline positions.
- Buyers looking for flip-up arms to help tuck a chair under a desk.
- People who value customer-reported comfort and ease of assembly, while recognising that experiences vary.

## Less suited to

- Buyers who need reliable forward tilt based on the reported adjustment concern.
- Anyone who needs confirmed dimensions or seat-height range before purchase without first checking the selected variant.

## Customer feedback

Customer feedback highlights comfort, back support, build quality and easy assembly, with mesh breathability and appearance also mentioned positively. Experiences with adjustability are mixed, including reports that the chair does not tilt forward far enough. For buyers considering long desk sessions, the positive comfort reports may be relevant, but they do not guarantee an individual fit. The overall ratings lean positive while still including a meaningful lower-star share, so they should not be read as unanimous approval.
- Positive themes: Customers describe the chair as comfortable and supportive, and some praise its build quality.
- Positive themes: Customers report that assembly is easy.
- Positive themes: The mesh back and appearance receive positive mentions.
- Negative themes: Some customers report that the chair does not tilt forward far enough.
- Mixed feedback: Feedback on adjustability is mixed, with generally positive impressions alongside the forward-tilt concern.

## Frequently asked questions

### What recline angles are listed for the SIHOO B100?
The feature description gives three positions: 110°, 123° and 135°. Some customers report that forward tilt is insufficient, so consider that separately from the listed recline positions.
### Does the chair have adjustable lumbar support?
Yes. The listing describes adaptive lumbar support, and customer feedback also mentions back support positively.
### What should I confirm about the dimensions?
The listing provides two different overall dimension sets and conflicting seat-height information. Confirm measurements for the exact B100-GMUK variant before ordering.
### Is assembly required?
The listing says assembly is required. Customers generally describe assembly as easy, though individual experiences can differ.

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## Images

![SIHOO B100-GMUK Full-Mesh Office Chair — 1](https://bargainpostbox.co.uk/i/QrVV1El59lToTk5yBDy13nOSZjWdc2NipY7laF3dpHFCjtC8-fjnKYMz64QxhTb-w5dO7mWmtem9OnqNnXCxoG8MXak7b2-xuRQ2FIUEquQq7cciCw3Xq4ip.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 2](https://bargainpostbox.co.uk/i/49oRk_73EDIiwMGtupMObsR8SsFiPbrq-TH1LyoxbW5HWTCqQsC3vd9kto3PDxYJ1JzWjVgZ8qHJDuQ23oqIBtezzTOlhj8R_dvIfSeIxmr0jS4mGjbaep-i.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 3](https://bargainpostbox.co.uk/i/yhZnHVvnbUw8FF9P_bcpbOvR05Hv_BTDRBc4XIppNRU9R7UN6-sserOSbcS5teVtVQoA9RZ0rDU8gAggLqU2W7xvflcO4hjSXMWwEOyXiSzQKIqpTHD_l3Ui.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 4](https://bargainpostbox.co.uk/i/kLkAZTN51u4SQTBfeibBeaho_dRGN0HvEnLRd9Xh4tbKAqVvNg_SsfjqPuAbMr74tlj5WZVCF5Zfc4YtPBMlmYgQdshVc1ZbXxHYX4IGXbCx54DelfsDIyVs.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 5](https://bargainpostbox.co.uk/i/bb2sP7RwLoBpu5mt4yp3xDzJBUdxarJvMEy_F7zQIP6aNcO5jAINM-NTiFmOn79mkn_AZm5T-B2nGGP_TqWEynyH-0jhYkNHxMeBcpI6a1VzrYIZdwG_kkGw.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 6](https://bargainpostbox.co.uk/i/1UWwtIGnLgkxc0jYpMgRm3fdpU0iew7HYv9dnByvWSO9sFtVJrTQdJHnu4IedA-SCcMptrma9J-4-oH1E4jgcexqEnOQBD5TYN5AH8GvWFt3asTXp8vTB3nM.jpg)

![SIHOO B100-GMUK Full-Mesh Office Chair — 7](https://bargainpostbox.co.uk/i/L69tt7U7hxRRYs7HVT4EYEPctKW7ZPjQHy_LDM9UH6i6Z0KLkbQknphEFPMXDqIBOameHt0M8kIjp_f1fMeIFYRQolZ9vSPF2fVYi76gf2D9Xw5w-v4c6MQu.jpg)