SIHOO Doro C300 Ultra V2 vs X-Chair X3

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

SIHOO

SIHOO Doro C300 Ultra V2

$679.99 – $689.99

X-Chair

X-Chair X3

$979

$299.01

lower starting price for SIHOO Doro C300 Ultra V2 than X-Chair X3 at the brand stores

Differences at a glance

SIHOO Doro C300 Ultra V2X-Chair X3

Price: $679.99 – $689.99$979
Seat height: 47.5–55.5 cm (≈ 18.7-21.9 in)17.69–22 in
Seat depth: 16.9–18.5 in (≈ 43-47 cm)16.75–19.25 in
Load capacity: 330 lb (≈ 150 kg)275 lb (125 kg)
Recline: Recline Angles 105°, 120°, 135°SciFloat Infinite Recline + Tilt Lock and Tension allows you to recline and lock into position or increase tension in your recline motion for more fluid movement.
Arms: 8D Bionic Armrests (up, down, forward, back, rotate, or tilt)4-Dimensional armrests come standard (up, down, side-to-side, front-to-back); option to upgrade to FS 360 rotational armrests; Armrest Height 5.875in - 8.875in
Headrest: Ultra-wide 3D headrest, adjusts in three directionsOptional add-on (standard configuration: No headrest; Headrest +$115)
Lumbar support: Domino™ Sacral-Lumbar Support 2.0: moves up or down, 3 support levelsDynamic Variable Lumbar (DVL)® Support; height adjustable backrest raises the DVL®
Warranty: 3 years (covers manufacturing defects)5 years (all parts and materials); 15 years (non-moving metal components, chair frame)

Which is cheaper, the SIHOO Doro C300 Ultra V2 or the X-Chair X3?

The SIHOO Doro C300 Ultra V2 is cheaper to start: $679.99 versus $979 for the X-Chair X3 at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO Doro C300 Ultra V2, rated for 330 lb versus 275 lb for the X-Chair X3.

Which has a headrest?

Both: the SIHOO Doro C300 Ultra V2 as standard and the X-Chair X3 as an option.