FlexiSpot Soutien Ergonomic Office Chair (C5) vs SIHOO Doro C300
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

FlexiSpot
FlexiSpot Soutien Ergonomic Office Chair (C5)
$249.99 – $279.99
VS
SIHOO
SIHOO Doro C300
$559.99 – $569.99
$310
lower starting price for FlexiSpot Soutien Ergonomic Office Chair (C5) than SIHOO Doro C300 at the brand stores
Differences at a glance
Sources
- Soutien Ergonomic Office Chair C5 | Flexispot ↗Checked Oct 17, 2026
- Doro C300 Ergonomic Office Chair – UK Sihoo official Shop ↗Checked Sep 29, 2026
- Sihoo Doro C300 Advanced Ergonomic Office Chair – Official US Sihoo Store ↗Checked Sep 29, 2026
FlexiSpot Soutien Ergonomic Office Chair (C5)SIHOO Doro C300
- Price
- $249.99 – $279.99$559.99 – $569.99
- Seat height
- 17.9–20.9 in47–55 cm
- Seat depth
- 18.7 in43.5–46 cm
- Load capacity
- 300 lb330 lb (≈ 150 kg)
- Recline
- 95–115°Recline Angles: 110°, 120°, 130°
- Arms
- 2D4D coordinated armrests (Up and down, left, right, forward and backward, tilt linkage)
- Headrest
- 2D3D Mechanical Headrest
- Lumbar support
- 2DSelf-adaptive dynamic lumbar support
- Warranty
- 5 years3 years
Questions
Which is cheaper, the FlexiSpot Soutien Ergonomic Office Chair (C5) or the SIHOO Doro C300?
The FlexiSpot Soutien Ergonomic Office Chair (C5) is cheaper to start: $249.99 versus $559.99 for the SIHOO Doro C300 at the brand stores (Oct 2026).
Which has a higher weight capacity?
The SIHOO Doro C300, rated for 330 lb versus 300 lb for the FlexiSpot Soutien Ergonomic Office Chair (C5).
Which has a headrest?
Both: the FlexiSpot Soutien Ergonomic Office Chair (C5) as standard and the SIHOO Doro C300 as standard.
FlexiSpot Soutien Ergonomic Office Chair (C5): specs, reviews, where to buy →SIHOO Doro C300: specs, reviews, where to buy →
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- SIHOO Doro C300 vs Steelcase Series 1 Headrest: 3D Mechanical Headrest on SIHOO Doro C300; Optional headrest on Steelcase Series 1.
- SIHOO Doro C300 vs HBADA E3 Air (2026 Edition) Arms: 4D coordinated armrests on SIHOO Doro C300; Armrest Height: 68.5cm–84cm on HBADA E3 Air (2026 Edition).





