HBADA E3 Pro vs SIHOO Doro C300 Pro: Specs, Warranty and Price

Research note: This comparison uses each brand's published store specifications (HBADA US, UK and EU stores; SIHOO US, UK and EU stores), not a hands-on Chairpedia test. Figures are quoted as each brand states them, with the store they come from.

Introduction

The HBADA E3 Pro (2026 Edition) and the SIHOO Doro C300 Pro are both mesh-back chairs with an adjustable seat depth, a separate adjustable headrest and armrests that move in more directions than the usual four. In one sentence: the E3 Pro lists lower, reclines further and has a longer warranty on its core parts, while the C300 Pro has the higher seat range and a lumbar pad that follows the backrest without manual setting. Both list a 330 lb maximum load on their US stores, so the choice is about adjustment style, warranty and price rather than capacity.

At a glance

HBADA E3 Pro — strengths and weaknesses

Documented features: HBADA's EU store gives the E3 Pro 2026 Edition a seat height of 46–54.5 cm (about 18.1–21.5 in) and a seat depth of 45–50 cm (about 17.7–19.7 in); the UK store gives a seat width of 51.5 cm. It lists four recline positions: 105°, 115°, 130° and 140°. HBADA calls the armrests 720° Omni-Functional: the pad rotates 360°, the arm body swivels 360°, height moves 7 cm and forward/backward 6 cm, and the arm can flip up 26° or down 13°. The 3-Zone Adaptive Lumbar Support adjusts in height over 6 cm in six levels, moves forward and backward 3.2 cm with an adaptive or a lock mode, and has side wings that rotate 40°. The 4D headrest rotates 70° on two axes, moves 4 cm in height and 7 cm forward and backward. The US store lists a 330 lbs (150 kg) maximum load, a recommended user height of 155–195 cm, and a warranty of 5 years on core load-bearing components (base, gas lift, casters) and 3 years on other components.

Check before buying: HBADA's stores do not publish a chair weight for the E3 Pro, so you cannot compare how heavy the box is. The UK store's upper seat height figure does not match its own stated stroke, so we show the EU range. The regular US price is $659 without the footrest and $709 with it; on 2026-10-08 the store also showed a lower sale price.

SIHOO Doro C300 Pro — strengths and weaknesses

Documented features: SIHOO's EU store gives a seat cushion height range of 46-56.7 cm (18.11-22.32 in), and the US store gives a seat depth of 16.81-17.76 in, a maximum hip width of 20.28 in, general dimensions of 28 in wide, 28 in deep and 45-51 in high, a 330 lbs maximum load, a product weight of 55.34 lbs and a three-year warranty. The UK store quotes a maximum recline angle of 135°. The 6D coordinated armrests move up and down, left and right, front and back, and inward and outward, with a tilt-lock. SIHOO calls the lumbar the BM Tracking System: it conforms to the backrest as you move rather than being set by hand. The headrest adjusts up and down, back and forth, and rotates. SIHOO designs the chair for users from 5 ft to 6 ft 3.

Check before buying: The lumbar pad has no manual depth or height setting listed, which suits some sitters and not others. The seat depth range is shorter than the E3 Pro's. SIHOO's UK and EU stores list a lower load figure than the US store; we show the US figure. The regular US price is $789.99 for the Black Standard Version up to $839.99 for the White Footrest Version.

How they differ

Price. At regular US prices the E3 Pro ($659-$709) lists about 131 dollars below the Doro C300 Pro ($789.99-$839.99) at each matching level (without or with footrest).

Warranty. HBADA splits its warranty: 5 years on the base, gas lift and casters, 3 years on everything else. SIHOO lists three years for the whole chair. On the parts that carry your weight, the HBADA cover is two years longer.

Seat height and depth. Both seats start at 46 cm. The C300 Pro tops out at 56.7 cm against 54.5 cm for the E3 Pro, which matters for taller sitters or a high desk. For depth, the E3 Pro adjusts across 45–50 cm, while the C300 Pro's 16.81-17.76 in range sits shorter.

Recline. The E3 Pro lists four positions up to 140°; the C300 Pro lists a maximum of 135°.

Lumbar. This is the clearest difference in approach. The E3 Pro's lumbar is set by hand (height, depth, and a lock or adaptive mode). The C300 Pro's pad tracks the backrest by itself, with nothing to set.

Armrests and headrest. Both arms move inward and outward. HBADA also lets the arm flip up or down and publishes travel figures; SIHOO adds a tilt-lock. HBADA publishes headrest travel figures; SIHOO lists the directions only.

Who should buy which

Pick the HBADA E3 Pro if you want a hand-set lumbar pad, the deeper 140° recline, a longer seat for longer thighs, and the 5-year cover on core parts at the lower list price. Pick the SIHOO Doro C300 Pro if you sit at a high desk or are tall enough to use the extra seat height, prefer a lumbar pad you never have to adjust, and want a published chair weight before carrying it upstairs. If the SIHOO lumbar approach appeals but the price does not, the newer SIHOO Doro C300 Pro V2 lists lower with a manually adjustable lumbar.

Sources

• HBADA US, UK and EU official stores — E3 Pro Ergonomic Office Chair 2026 Edition product pages (specifications, regular price, warranty), checked 2026-10-08.
• SIHOO US, UK and EU official stores — Doro C300 Pro product pages (specifications, regular prices, warranty), checked 2026-10-08.

Bottom line

Same 330 lb US load rating, both with seat depth adjustment and multi-direction arms. The HBADA E3 Pro is the lower-priced, further-reclining chair with a longer warranty on its core parts; the SIHOO Doro C300 Pro is the taller-seated chair with a lumbar pad that adjusts itself. Check the live sale prices and return terms on both stores before ordering, since promotions change the gap.