SIHOO Doro C300 Pro V2 vs Herman Miller Cosm High Back

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

SIHOO

SIHOO Doro C300 Pro V2

$499.99 – $549.99

Herman Miller

Herman Miller Cosm High Back

$1,925 – $2,400

9 years

longer warranty on Herman Miller Cosm High Back than SIHOO Doro C300 Pro V2 (official terms)

Differences at a glance

SIHOO Doro C300 Pro V2Herman Miller Cosm High Back

Price: $499.99 – $549.99$1,925 – $2,400
Seat height: 17.5–20.9 in14.8–21.4 in (37.6–54.4 cm)
Seat depth: Seat Depth 16.9" - 18.5"15.9 in (40.4 cm)
Load capacity: 330 lb (≈ 150 kg)350 lb (158.8 kg)
Arms: 8D Bionic Armrests (up, down, forward, back, rotate, or tilt)Leaf Arms; Height-Adjustable Arms; Fixed Arms; No Arms; Arm Height: 7.3–11.7"
Warranty: 3 years (covers manufacturing defects)12-year, 3-shift warranty, with limited exceptions

Which is cheaper, the SIHOO Doro C300 Pro V2 or the Herman Miller Cosm High Back?

The SIHOO Doro C300 Pro V2 is cheaper to start: $499.99 versus $1,925 for the Herman Miller Cosm High Back at the brand stores (Oct 2026).

Which has a higher weight capacity?

The Herman Miller Cosm High Back, rated for 350 lb versus 330 lb for the SIHOO Doro C300 Pro V2.