SIHOO B300 Pro 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 B300 Pro

$329.99 – $379.99

FlexiSpot

FlexiSpot Soutien Ergonomic Office Chair (C5)

$249.99 – $279.99

2 years

longer warranty on FlexiSpot Soutien Ergonomic Office Chair (C5) than SIHOO B300 Pro (official terms)

Differences at a glance

SIHOO B300 ProFlexiSpot Soutien Ergonomic Office Chair (C5)

Price: $329.99 – $379.99$249.99 – $279.99
Seat height: 46.8–55.3 cm17.9–20.9 in
Seat depth: 16.5–18.5 in (≈ 42-47 cm)18.7 in
Load capacity: 330 lb (≈ 150 kg)300 lb
Recline: Three lockable recline angles: 105°, 120°, 135°95–115°
Arms: 6D All-Around Armrests (rotate, adjust, flip up)2D
Headrest: 3D Ultra-Wide Headrest2D
Lumbar support: 4D MicroFit Lumbar Support: 0.8" depth and 2" height adjustment2D
Warranty: 3-Year Free Warranty5 years

Which is cheaper, the SIHOO B300 Pro or the FlexiSpot Soutien Ergonomic Office Chair (C5)?

The FlexiSpot Soutien Ergonomic Office Chair (C5) is cheaper to start: $249.99 versus $329.99 for the SIHOO B300 Pro at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO B300 Pro, rated for 330 lb versus 300 lb for the FlexiSpot Soutien Ergonomic Office Chair (C5).

Which has a headrest?

Both: the SIHOO B300 Pro as standard and the FlexiSpot Soutien Ergonomic Office Chair (C5) as standard.