HBADA E3 Pro vs SIHOO Doro C300: Which Should You Buy?

Key difference: The E3 Pro reclines further (up to 140° against 130°), but the C300 lists about $100 lower.

This page sets HBADA's official figures for the E3 Pro against SIHOO's for the C300, with regular US list prices; it is not based on a Chairpedia test.

Why compare them

Why put the HBADA E3 Pro next to the SIHOO Doro C300? The HBADA E3 Pro and the SIHOO Doro C300 are both mesh chairs with a headrest and adjustable seat depth, from two brands that sell direct.

Specs side by side

Strengths and weaknesses

HBADA E3 Pro

Strengths

• Deeper recline: up to 140° against 130° on the C300.
• Longer warranty: 5 years on the base, gas lift and casters; 3 years on other parts, against 3 years on the C300.
• Lumbar adapts on its own and can also be set by hand ("3-Zone Adaptive Lumbar Support System: 6-level height adjustment 2.36"/6cm, forward/backward 1.26"/3.2cm (adaptive/lock modes), adaptive glide 1.18"/3cm, 40° side wing rotation (3 levels)"), unlike the C300.
• 4D headrest, against 3D on the C300.
• More recline lock positions: 4 against 3 on the C300.

Weaknesses

• Costs more: from $659 against $559.99 for the C300.

SIHOO Doro C300

Strengths

• Lower list price: from $559.99 against $659 for the E3 Pro.

Weaknesses

• Shallower recline: up to 130° against 140° on the E3 Pro.
• Shorter warranty: 3 years, against 5 years on the base, gas lift and casters; 3 years on other parts on the E3 Pro.
• Lumbar works automatically with no manual setting listed ("Self-adaptive dynamic lumbar support"), unlike the E3 Pro.
• 3D headrest, against 4D on the E3 Pro.
• Fewer recline lock positions: 3 against 4 on the E3 Pro.

How they differ

Recline. The HBADA E3 Pro lists “Up to 140°; positions at 105°, 115°, 130° and 140°”, the SIHOO Doro C300 “Up to 130°; positions at 110°, 120° and 130°”. The E3 Pro leans back further.

Price. At regular US list prices the HBADA E3 Pro is $659–$709 and the SIHOO Doro C300 is $559.99–$569.99. The C300 lists about $100 below the E3 Pro, before any store sale. Price options: the E3 Pro — E3 Pro 2026 Edition, Black or Gray: Without Footrest $659, With Footrest $709; the C300 — $559.99–$569.99.

Warranty. The HBADA E3 Pro lists “5 years on the base, gas lift and casters; 3 years on other parts”, the SIHOO Doro C300 “3 years”. The E3 Pro's cover runs longer.

Lumbar support. The HBADA E3 Pro lists “3-Zone Adaptive Lumbar Support System: 6-level height adjustment 2.36"/6cm, forward/backward 1.26"/3.2cm (adaptive/lock modes), adaptive glide 1.18"/3cm, 40° side wing rotation (3 levels)”, the SIHOO Doro C300 “Self-adaptive dynamic lumbar support”. The E3 Pro's lumbar adjusts in more ways than the C300's.

Headrest. The HBADA E3 Pro lists “4D Dual-Axis Adjustable Headrest: frame rotation 70°, axis rotation 70°, height 1.57"/4cm, forward/backward 2.76"/7cm”, the SIHOO Doro C300 “3D Mechanical Headrest”. The E3 Pro's headrest has more adjustment than the C300's.

Seat size. Seat height: the HBADA E3 Pro lists “≈18.1–21.5 in (46–54.5 cm)”, the SIHOO Doro C300 “18.50–21.65 in (47–55 cm)”. Seat width: the HBADA E3 Pro lists “20.27 in (51.5 cm)”, the SIHOO Doro C300 “19.49 in (49.5 cm)”. Seat depth: the HBADA E3 Pro lists “≈17.7–19.7 in (45–50 cm)”, the SIHOO Doro C300 “43.5–46 cm”.

Other details. For the E3 Pro and C300, the table above gives the armrests, maximum load and chair weight in each brand's own wording.

Same on both. The E3 Pro and C300 list the same Footrest Version option.

Who should buy which

• Pick the E3 Pro over the C300 if you want a deeper recline (up to 140°).
• Pick the E3 Pro over the C300 if you want a longer warranty (5 years on the base, gas lift and casters; 3 years on other parts).
• Pick the E3 Pro over the C300 if you want lumbar you can also fine-tune by hand.
• Pick the C300 over the E3 Pro if you want the lower price — the C300 lists about $100 below the E3 Pro.

Not published by the brand (E3 Pro vs C300): chair weight for the HBADA E3 Pro.

Sources

• HBADA E3 Pro (compared here with the C300): HBADA E3 Pro Ergonomic Office Chair 2026 Edition – HBADA EU official store; HBADA E3 Pro Ergonomic Office Chair 2026 Edition – HBADA UK official store; HBADA E3 Pro Ergonomic Office Chair 2026 Edition – HBADA US official store, checked 2026-10-08; US list price from HBADA US Official Store, checked 2026-10-08.
• SIHOO Doro C300 (compared here with the E3 Pro): Doro C300 Ergonomic Office Chair – UK Sihoo official Shop; Sihoo Doro C300 Advanced Ergonomic Office Chair – Official US Sihoo Store, checked 2026-09-29; US list price from SIHOO US Official Store, checked 2026-10-07.
• Figures marked ≈ for the E3 Pro and C300 are Chairpedia's unit conversions, not brand figures.