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Key takeaways
- Best overall: Sihoo M57 £216.84 — high-back mesh, 3D armrests, adjustable headrest, tilt lock and a 3-year warranty on the listing. The default WFH pick at this price.
- Best on a tight budget: Songmics Ergonomic Office Chair (S-shaped backrest) £79.99 — double-layer mesh back, tilt lock from 90° to 135°, 150 kg rating. No adjustable lumbar, so keep the sessions shorter.
- Best for all-day sitting: FlexiSpot ErgoX £219.99 — adaptive lumbar that moves with you, 3D armrests, adjustable headrest and seat depth.
- Best with adjustable lumbar: Sihoo M18 £149.99 — high-back mesh with adjustable lumbar, headrest and 2D armrests.
- Best for small rooms: Sihoo B100 £139.99 — flip-up armrests that tuck under the desk, and a lumbar that flexes as you lean.
- What matters most: lumbar support you can adjust (or that adapts), and a seat height that fits YOUR desk. Skip the bargain bin (foam flattens) and ‘gaming’ chairs sold as ergonomic.
The difference between a bargain chair and a mid-range one is not comfort on day one: both feel fine in the showroom. It is comfort in month eight. Cheap chairs fail in predictable ways: the foam flattens, the gas lift sinks, the armrests wobble loose, and the lumbar curve that looked supportive turns out to be a fixed lump in the wrong place. For a chair you sit in 40 hours a week, those are the specs that matter.
Below are five chairs from Amazon UK with specs taken from their listings. We have not sat in them. Where a listing is vague, we say so.
TL;DR
- Best overall: Sihoo M57 £216.84 — high-back mesh, 3D armrests, adjustable headrest, tilt lock. The default recommendation. - Best on a tight budget: Songmics Ergonomic Office Chair £79.99 — mesh back and a tilt lock at the lower end of the price range. - Best for all-day: FlexiSpot ErgoX £219.99 — adaptive lumbar, 3D armrests, adjustable headrest. For long days. - Adjustable lumbar and a headrest: Sihoo M18 £149.99 — high-back mesh, adjustable lumbar, 2D armrests. - Skip: the bargain bin (foam and gas lift fail early), and ‘gaming’ bucket-seat chairs marketed as ergonomic: the wings push your shoulders forward, the opposite of what you want at a desk.
What actually matters when choosing a desk chair
- Lumbar support that adjusts or adapts. This is the single most important feature for back comfort over long days. ‘Lumbar support’ on a spec sheet can mean a fixed bump (often in the wrong spot), an S-shaped backrest, a pad you move up and down, or a mechanism that flexes with you. Only the last two fit your spine reliably. If the listing does not say adjustable or adaptive, assume it is fixed.
- Seat height range vs your desk. A chair is only ergonomic if it lets your elbows sit at desk height with feet flat. Check the stated range: it is the spec most people forget and most returns are about.
- Mesh vs cushioned back. Mesh breathes and conforms; cushioned feels plusher at first but the foam compresses over time. Cushioned seats are fine; cushioned backs are where the foam-flattening happens.
- Armrest adjustability. Fixed armrests that do not tuck under the desk force you to sit too far back. Height-adjustable (2D) is the minimum; 3D (also angle or depth) is a real comfort upgrade for typing posture.
- Weight rating and the gas lift. Most chairs here rate 120 to 150 kg. The gas lift is the most common failure point; a BIFMA or SGS certified lift is worth looking for in the spec, and so is a warranty of three years rather than one.
Best overall under £300 — Sihoo M57
The Sihoo M57 £216.84 covers the features that matter on a normal budget: a breathable high-back mesh, an adjustable headrest, 3D armrests (five height positions, with a surface that moves back and forth and rotates) and a tilt lock with three recline angles. The listing says the gas lift is BIFMA and SGS certified and that the chair is rated for 150 kg, and it states a 3-year warranty.
It is not a Herman Miller. The materials are mid-range, and the backrest is S-shaped rather than fitted with an adjustable lumbar pad, so if lumbar adjustment is your priority, look at the M18 or the ErgoX below. For the price, the armrests and headrest are the standout.
Trade-offs: - The seat cushion is firm, which some people like and some do not. - No adjustable lumbar pad on the listing. - Seat height adjustment is about 10 cm, so check it against your desk.
The right buy for most people working from home who want a well-equipped mesh chair without spending flagship money.
Best on a tight budget — Songmics
The honest budget pick. The Songmics Ergonomic Office Chair £79.99 has a double-layer mesh back, a 7 cm sponge seat with sponge-padded armrests, a tilt lock anywhere between 90 and 135 degrees, a class-3 gas cylinder and a metal base. The listing rates it for 150 kg.
What you give up versus the Sihoo: the listing does not mention adjustable lumbar or a headrest, the armrests are padded rather than multi-way, and there are fewer adjustment points overall. It does the core job without the false economy of a bargain-bin chair that sinks within three months.
Trade-offs: - Lumbar support is the S-shaped backrest only. Fine for shorter days, less so for marathons. - Fewer adjustment points. - Check the assembly and the exact model, as Songmics sells several ergonomic chairs.
The right buy if budget is the hard limit and you still want something that will not fail by Christmas.
Best for all-day sitting — FlexiSpot ErgoX
If you sit long hours, or you are choosing a chair for back pain, the step-up buys better support. The FlexiSpot ErgoX £219.99 has an adaptive lumbar that the listing says moves with your body, 3D armrests, an adjustable headrest, adjustable seat depth (6 cm) and a recline to 135 degrees. It is rated for 136 kg.
This is the category where spending more shows. The adjustment range is wider and the frame is built around the lumbar and the recline rather than around a price.
Trade-offs: - It sits near the top of the under-£300 band and some ErgoX variants (with a footrest, or the Pro) cost more, so check which one you are buying. - It is bulkier than the Sihoo chairs. - The seat height range is about 9 cm, so check it against your desk.
Worth buying if back comfort over long days is the priority. If you sit three or four hours a day, the Sihoo M57 is the smarter spend.
Adjustable lumbar and a headrest — Sihoo M18
The Sihoo M18 £149.99 is a high-back mesh chair with adjustable lumbar support, an adjustable headrest, 2D (height-adjustable) armrests, a wide seat with a waterfall front edge and a tilt lock. The listing rates it for 150 kg and states a 3-year warranty.
It is the Sihoo to choose if you want a lumbar pad you can move and you can live with simpler armrests than the M57.
Trade-offs: - 2D armrests move up and down only. - It is a full high-back chair, so it takes up real floor space; for a tight room, see the B100 below.
The right buy when adjustable lumbar matters more to you than armrest range.
Comparison table
| Model | Back | Lumbar | Armrests | Headrest | Weight rating | Warranty (listing) | Price now |
|---|---|---|---|---|---|---|---|
| Sihoo M57 | High-back mesh | S-shaped backrest | 3D | Adjustable | 150 kg | 3 years | £216.84 |
| Songmics S-shaped backrest | Double-layer mesh | S-shaped backrest | Padded | Not listed | 150 kg | Not stated | £79.99 |
| FlexiSpot ErgoX | Mesh | Adaptive | 3D | Adjustable | 136 kg | Check the listing | £219.99 |
| Sihoo M18 | High-back mesh | Adjustable | 2D | Adjustable | 150 kg | 3 years | £149.99 |
| Sihoo B100 | Full mesh | Self-adjusting | Flip-up 2D | Adjustable, 11 positions | 120 kg | 3 years | £139.99 |
Specs vary by version and batch on Amazon UK, and some listings disagree with themselves (the B100 lists both 300 lb and 120 kg). Confirm against the live listing before buying.
Things the marketing doesn't tell you
- ‘Lumbar support’ is not one feature. It can be a fixed bump, an S-shaped backrest, an adjustable pad or a mechanism that adapts. Two chairs with the same words in the title can be very different. - Armrest names mean different things. 2D is up and down; 3D adds angle or position. Flip-up arms are for tucking under a desk, not for adjustment. - The weight rating is a build hint, not a promise. A higher rating is a rough proxy for a sturdier base and gas lift, and listings sometimes quote it in pounds and kilos that do not match. - Seat height range is narrow. Many chairs give you 9 or 10 cm. If you are very tall or short, or your desk is non-standard, that range is what decides it. - Warranty length varies more than price. The Sihoo listings state three years. Read the warranty line, not just the star rating.
Verdict
For most people working from home: Sihoo M57 £216.84. The armrests, the headrest and the mesh are the best-equipped combination here, and the warranty is three years.
If budget is the hard limit: Songmics. The sensible floor: real ergonomic basics without the bargain-bin false economy.
If you sit all day and your back complains: FlexiSpot ErgoX. The adaptive lumbar and the wider adjustment justify the spend only if you are in the chair for long hours.
Skip the bargain bin, and skip gaming chairs sold as ergonomic. If you are also sorting out the rest of the desk setup, our best UK laptops under £500 guide covers the machine to go with the chair, and the monitors guide the screen.
For a small room: Sihoo B100
The Sihoo B100 £139.99 is the one to look at when floor space is the constraint. It has a full-mesh back and seat, a lumbar the listing calls self-adjusting (it flexes as you lean or recline), an 11-position headrest and flip-up 2D armrests that slide under the desk. Seat height runs from 46.5 to 55.5 cm and the listing says it fits users from 5ft 1in to 6ft 1in. The warranty is three years. Trade-off: the rating is 120 kg, lower than the other Sihoo chairs here.
Our picks
SIHOO M57 Ergonomic Mesh Office Chair
Sihoo
High-back mesh, adjustable headrest, 3D armrests (five height positions, plus back-and-forth and rotation), tilt lock, BIFMA and SGS certified gas lift, 150 kg rating, 3-year warranty on the listing. The lumbar is an S-shaped backrest rather than an adjustable pad.
£216.84 Retrieved on 14/11/2026 · prices subject to change
SONGMICS Ergonomic Office Chair S-Shaped Backrest
Songmics
Double-layer mesh back, 7 cm sponge seat, sponge-padded armrests, tilt lock between 90 and 135 degrees, class-3 gas cylinder, 150 kg rating. S-shaped backrest, no adjustable lumbar.
£79.99 Retrieved on 14/11/2026 · prices subject to change
FLEXISPOT ErgoX Ergonomic Office Chair
FlexiSpot
Adaptive lumbar support that moves with your body, 3D armrests, adjustable headrest, seat depth adjustment, recline to 135 degrees, 136 kg rating. The step-up if you sit long hours. The listing we match is the version with a footrest.
£219.99 Retrieved on 14/11/2026 · prices subject to change
SIHOO M18 Ergonomic Office Chair
Sihoo
High-back mesh with adjustable lumbar support, adjustable headrest, 2D armrests, wide cushion, tilt lock, 150 kg rating and a 3-year warranty on the listing.
£149.99 Retrieved on 14/11/2026 · prices subject to change
SIHOO B100 Full-Mesh Office Chair
Sihoo
Full-mesh back and seat, self-adjusting lumbar, flip-up 2D armrests that slide under the desk, 11-position headrest, seat height 46.5 to 55.5 cm, 3-year warranty. The listing says it fits users from 5ft 1in to 6ft 1in.
£139.99 Retrieved on 14/11/2026 · prices subject to change
On ThePriceMonkey
Products from this guide in our catalogue — current price, specs and availability on each page.
- SIHOO M57 Ergonomic Mesh Office Chair · SIHOO
- SONGMICS Ergonomic Office Chair S-Shaped Backrest · SONGMICS
- FLEXISPOT ErgoX Ergonomic Office Chair · FLEXISPOT
- SIHOO M18 Ergonomic Office Chair · SIHOO
- SIHOO B100 Full-Mesh Office Chair · SIHOO
FAQ
What's the best office chair for back pain under £300 in the UK?
For back pain, prioritise lumbar support that adjusts or adapts over every other feature, and a chair you can sit in for hours without the support shifting. In this guide the FlexiSpot ErgoX £219.99 is built around that: its listing describes an adaptive lumbar that moves with your body. The Sihoo M18 £149.99 lists adjustable lumbar. The Sihoo M57 £216.84 has an S-shaped backrest and good armrests, but no adjustable lumbar pad on its listing. Avoid fixed-lumbar chairs and gaming chairs with bucket seats. If your back pain is persistent, a chair helps but is not a substitute for medical advice.
Is a mesh or cushioned chair better for working from home?
For all-day use, mesh backs are generally the safer choice: they breathe, they conform to your spine, and they do not suffer the foam-flattening that makes cushioned backs feel worse over months. Cushioned seats are fine; the issue is cushioned backs, where compressed foam loses its support. If you prefer a plush feel, a cushioned seat with a mesh back is a good middle ground, which is what the Songmics and Sihoo chairs here use.
How much do I need to spend for a genuinely good WFH chair?
A usable ergonomic chair starts at the Songmics end of the shelf: mesh back, a tilt lock and a certified gas lift. Below that, the gas lift and foam tend to fail early, so it is a false economy. The Sihoo M57 and M18 tier adds a headrest, better armrests and a longer warranty, and is the sweet spot for most people. Above that you are paying for adaptive lumbar and a more adjustable frame, which pays off if you sit long hours.
Are gaming chairs good for working from home?
Generally no, despite the marketing. The bucket-seat ‘wings’ on most gaming chairs push your shoulders forward and inward, the opposite of the open, upright posture you want for typing. They also tend to have a fixed lumbar pillow rather than adjustable support. A gaming chair can work if it has genuinely adjustable lumbar and a flat-ish seat, but a purpose-built ergonomic office chair at the same price is almost always the better desk choice.
What seat height do I need?
You want your feet flat on the floor with thighs roughly parallel to the ground, and your elbows at desk height when typing. Gas lifts on these chairs cover only a limited range: the Sihoo B100 lists 46.5 to 55.5 cm, and the Sihoo M57 lists 10 cm of height adjustment. Check the chair’s stated seat-height range against your desk and your height before buying. Mismatched height is the most common reason WFH chairs get returned.
How long should a chair at this price last?
It depends on use and on the parts. The gas lift is the first thing to fail on cheaper chairs (the seat slowly sinks), so a lift described as BIFMA or SGS certified, as on the Sihoo listings, is a useful signal, and so is a warranty: the Sihoo M57, M18 and B100 listings state three years. Mesh backs generally outlast cushioned ones because there is no foam to compress. We do not test chairs, so treat this as a buying rule, not a lifespan.