SIHOO M59AS vs FlexiSpot Soutien Ergonomic Office Chair (C5)

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

SIHOO

SIHOO M59AS

$449.99

FlexiSpot

FlexiSpot Soutien Ergonomic Office Chair (C5)

$249.99 – $279.99

$200

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

Differences at a glance

SIHOO M59ASFlexiSpot Soutien Ergonomic Office Chair (C5)

Price: $449.99$249.99 – $279.99
Seat height: 46.5–56.5 cm17.9–20.9 in
Seat depth: 17.13 in (≈ 43.5 cm)18.7 in
Load capacity: 330 lb (≈ 150 kg)300 lb
Recline: Recline up to 126°95–115°
Arms: 3D coordinated flip-up armrests (flip up and down, left and right, forward and backward)2D
Headrest: Double-jointed headrest (height and angle)2D
Lumbar support: Dynamic lumbar support in a dual-section backrest2D
Warranty: 3 years5 years

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

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 SIHOO M59AS as standard and the FlexiSpot Soutien Ergonomic Office Chair (C5) as standard.