FlexiSpot Soutien Ergonomic Office Chair (C5) vs SIHOO B300 Pro

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 B300 Pro

$329.99 – $379.99

2 years

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

Differences at a glance

FlexiSpot Soutien Ergonomic Office Chair (C5)SIHOO B300 Pro

Price: $249.99 – $279.99$329.99 – $379.99
Seat height: 17.9–20.9 in46.8–55.3 cm
Seat depth: 18.7 in16.5–18.5 in (≈ 42-47 cm)
Load capacity: 300 lb330 lb (≈ 150 kg)
Recline: 95–115°Three lockable recline angles: 105°, 120°, 135°
Arms: 2D6D All-Around Armrests (rotate, adjust, flip up)
Headrest: 2D3D Ultra-Wide Headrest
Lumbar support: 2D4D MicroFit Lumbar Support: 0.8" depth and 2" height adjustment
Warranty: 5 years3-Year Free Warranty

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

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