FlexiSpot Soutien Ergonomic Office Chair (C5) vs SIHOO M59AS

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

SIHOO

SIHOO M59AS

$449.99

$200

lower starting price for FlexiSpot Soutien Ergonomic Office Chair (C5) than SIHOO M59AS at the brand stores

Differences at a glance

FlexiSpot Soutien Ergonomic Office Chair (C5)SIHOO M59AS

Price: $249.99 – $279.99$449.99
Seat height: 17.9–20.9 in46.5–56.5 cm
Seat depth: 18.7 in17.13 in (≈ 43.5 cm)
Load capacity: 300 lb330 lb (≈ 150 kg)
Recline: 95–115°Recline up to 126°
Arms: 2D3D coordinated flip-up armrests (flip up and down, left and right, forward and backward)
Headrest: 2DDouble-jointed headrest (height and angle)
Lumbar support: 2DDynamic lumbar support in a dual-section backrest
Warranty: 5 years3 years

Which is cheaper, the FlexiSpot Soutien Ergonomic Office Chair (C5) or the SIHOO M59AS?

The FlexiSpot Soutien Ergonomic Office Chair (C5) is cheaper to start: $249.99 versus $449.99 for the SIHOO M59AS at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO M59AS, 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 M59AS as standard.