SIHOO Doro S300: Features, Fit and Buying Guide
The SIHOO Doro S300 is SIHOO's flagship Doro chair: an all-mesh build with a weight-sensing "anti-gravity" recline, 6D armrests and dual dynamic lumbar, positioned as a value alternative to premium chairs. This guide covers its confirmed features, fit and what to check.
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Check these before you buy
The S300 sits above the C300 and comes in two colours only. Confirm the model and the fit — especially the headrest, which is the main design caveat.
Dimensions and fit
Manufacturer figures come from the maker's official product page; we check them against the Amazon listing before treating them as confirmed. Values we can't confirm for the linked listing are marked as such — take those from the listing you buy from.
| Measurement | Documented value | Status |
|---|---|---|
| Overall | 28 in W × 28 in D × 42–49 in H | Manufacturer-documented |
| Seat depth | 17.13–18.11 in (adjustable) | Manufacturer-documented |
| Max hip width | ≈ 20.08 in | Manufacturer-documented |
| Weight capacity | 330 lb (SIHOO US store); 136 kg / 300 lb (SIHOO UK/EU stores) | Manufacturer-documented |
| Armrests | 6D coordinated (up/down, left/right, front/back, in/out, tilt-lock, synced recline) | Manufacturer-documented |
| Lumbar | Dual dynamic self-adaptive pads, adjustable | Manufacturer-documented |
| Headrest | Integrated into the backrest (not a separate adjustable headrest) | Manufacturer-documented |
| Recline | Weight-sensing anti-gravity; recline angles 100°, 110°, 130° (SIHOO UK store) | Not confirmed |
| Back / seat | All-mesh (Italian velvet mesh + DuPont TPEE); aluminium base | Manufacturer-documented |
| Warranty | 3 years + 30-day trial | Manufacturer-documented |
Source: SIHOO official product page, Amazon listing (ASIN B0DQTRVSHS) and published reviews (checked 2026-09-10). SIHOO's UK store lists recline angles of 100°, 110° and 130°. BIFMA/SGS certified; a German Design Award is claimed by SIHOO (manufacturer claim).
Adjustable vs fixed
Design, ergonomics & build — in depth
The anti-gravity recline
The Doro S300 is SIHOO's flagship, and its signature is a weight-sensing "anti-gravity" recline that glides to almost any angle — reviewers describe a genuinely floating feel at this price. It's backed by deep adjustment (6D arms, an adjustable seat depth and dual dynamic lumbar) and a premium-feeling all-mesh, aluminium-framed build.
The headrest caveat
The one persistent limitation is the headrest: it's integrated into the backrest rather than separately adjustable, so how well it supports your neck depends on your height. Colours are Black and White only and there's no footrest version (don't confuse it with the C300 Pro). Take the weight capacity (330 lb, official) from the listing; the exact recline angle isn't officially stated (~135–138° per third parties). This guide combines manufacturer specifications with owner reviews from around the world.
Strengths and cautions
Drawn from manufacturer documentation and published reviews, not from our own use. Each point names its basis.
Who it's for, and who should skip it
Comparisons with key rivals
Rival figures are from published sources and are not verified by Chairpedia. Prices move constantly, so we link out instead of printing a number.
| Model | Lumbar | Armrests | Standout |
|---|---|---|---|
| SIHOO Doro S300 | Dual dynamic self-adaptive | 6D | Anti-gravity recline, all-mesh, value flagship |
| SIHOO Doro C300 | Self-adaptive dynamic | 3D | Same family, cheaper, 3D arms |
| Herman Miller Aeron (Remastered) | PostureFit SL (option) | Up to fully adjustable | Mesh icon, 3 sizes, 12-yr warranty |
| Nouhaus Ergo3D | 3D adjustable | 4D | Full mesh with 4D arms, cheaper |
The bottom line
The Doro S300 is SIHOO reaching for the premium tier, and its signature — a weight-sensing "anti-gravity" recline that glides to almost any angle — genuinely stands out at the price, backed by 6D arms, adjustable seat depth, dual dynamic lumbar and an all-mesh, aluminium-framed build. As a value alternative to four-figure chairs, it makes a strong impression.
The one persistent caveat is the headrest: it's integrated into the backrest rather than separately adjustable, so how well it supports your neck depends on your height. Add limited colours and no footrest option, and it's not for everyone — but if you want a floating recline and deep adjustment for the money, the S300 is a distinctive pick.
A floating recline and 6-way arms at a value price — just make sure the integrated headrest fits your height.
Where to buy
Not verified by Chairpedia: price, seller, stock and colour change without notice — confirm on the listing. The Amazon link is an affiliate link; the SIHOO link is a direct, non-affiliate link. Commission does not change the price you pay or what this guide says.
Frequently asked questions
How is the S300 different from the C300?+
The S300 is the flagship Doro: 6D arms, dual dynamic lumbar and a weight-sensing anti-gravity recline. The C300/C300 Pro are separate, cheaper models. There is no "S300 Pro" or footrest version of the S300.
Does it have an adjustable headrest?+
The headrest is integrated into the backrest, not a separate height-adjustable piece — its support depends on your height.
What's the weight capacity?+
330 lb per SIHOO's US store; SIHOO's UK and EU stores list 136 kg (300 lb). Confirm on the listing.
How far does it recline?+
SIHOO's UK store lists recline angles of 100°, 110° and 130°.
What is this guide based on?+
This guide combines manufacturer specifications with owner reviews from around the world. It draws on SIHOO's specs and published reviews.
Sources
- https://de.sihoooffice.com/nl-nl/products/sihoo-doro-s300-gravity-defying-ergonomic-chair
- https://www.amazon.com/dp/B0DQTRVSHS
Specifications are SIHOO's published figures as of the date shown and are not independently verified by Chairpedia. The recline angle isn't officially stated and a German Design Award is a manufacturer claim — confirm details on the listing you buy from.