SIHOO Doro C300 Ultra V2 vs Herman Miller Aeron

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

Herman Miller

Herman Miller Aeron

$1,775 – $2,840

9 years

longer warranty on Herman Miller Aeron than SIHOO Doro C300 Ultra V2 (official terms)

Differences at a glance

SIHOO Doro C300 Ultra V2Herman Miller Aeron

Price: $679.99 – $689.99$1,775 – $2,840
Seat height: 47.5–55.5 cm (≈ 18.7-21.9 in)14.4–19.3 in (36.6–49 cm); 14.8–22.8 in (37.6–57.9 cm); 15.8–22.8 in (40.1–57.9 cm)
Seat depth: 16.9–18.5 in (≈ 43-47 cm)16 / 17 / 18.5 in (40.6 / 43.2 / 47.0 cm)
Load capacity: 330 lb (≈ 150 kg)300 / 350 / 400 lb (136 / 158.8 / 181.4 kg)
Recline: Recline Angles 105°, 120°, 135°Harmonic 2 Tilt; options: Standard/Basic tilt, Tilt Limiter, Tilt Limiter with Seat Angle
Arms: 8D Bionic Armrests (up, down, forward, back, rotate, or tilt)Arm height 7.5–11.5 in (adjustable arms); 8.5 in (fixed arms); Options: Fully Adjustable Arms, Height-Adjustable Arms with Pivot, Height-Adjustable Arms, No Arms, Stationary Arms; Arm Height 7.5–11.5 in (Fully Adjustable Arms, specs page)
Headrest: Ultra-wide 3D headrest, adjusts in three directionsNone offered by Herman Miller
Lumbar support: Domino™ Sacral-Lumbar Support 2.0: moves up or down, 3 support levelsOptions: No additional support, PostureFit, Adjustable Lumbar Support, Adjustable PostureFit SL
Warranty: 3 years (covers manufacturing defects)12-year, 3-shift warranty, with limited exceptions

Which is cheaper, the SIHOO Doro C300 Ultra V2 or the Herman Miller Aeron?

The SIHOO Doro C300 Ultra V2 is cheaper to start: $679.99 versus $1,775 for the Herman Miller Aeron at the brand stores (Oct 2026).

Which has a headrest?

Only the SIHOO Doro C300 Ultra V2 (as standard); the Herman Miller Aeron does not offer one.