SIHOO Doro S300 vs SIHOO Doro C300 Pro V2: Which Should You Buy?

Key difference: The C300 Pro V2 lists $500 lower, but the Doro S300 has automatic lumbar support.

Every figure for the Doro S300 and C300 Pro V2 comes from SIHOO's own US, UK and EU stores, and prices are regular US list prices rather than sale prices; Chairpedia has not tested either chair.

Why compare them

Why put the SIHOO Doro S300 next to the SIHOO Doro C300 Pro V2? The Doro S300 carries the highest list price in SIHOO's Doro line, while the C300 Pro V2 costs about half as much, so the question is what the extra money buys.

Specs side by side

Strengths and weaknesses

SIHOO Doro S300

Strengths

• Automatic lumbar support ("Dual dynamic lumbar support; angle 90°-105° fine-tuned with the gas lift"), where the C300 Pro V2's is set by hand.

Weaknesses

• Costs more: from $999.99 against $499.99 for the C300 Pro V2.
• 6D armrests, against 8D on the C300 Pro V2.
• No manual lumbar setting is listed for the Doro S300, unlike the C300 Pro V2.
• Shallower recline: up to 130° against 135° on the C300 Pro V2.
• No footrest version is listed for the Doro S300, unlike the C300 Pro V2.

SIHOO Doro C300 Pro V2

Strengths

• Lower list price: from $499.99 against $999.99 for the Doro S300.
• 8D armrests, against 6D armrests on the Doro S300.
• Lumbar you set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), where the Doro S300's works on its own.
• Deeper recline: up to 135° against 130° on the Doro S300.
• A Footrest Version is sold; none is listed for the Doro S300.

Weaknesses

• Lumbar is set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), while the Doro S300's moves on its own.

How they differ

Price. At regular US list prices the SIHOO Doro S300 is $999.99 and the SIHOO Doro C300 Pro V2 is $499.99–$549.99. The C300 Pro V2 lists $500 below the Doro S300, before any store sale. Price options: the Doro S300 — $999.99 (Black and White); the C300 Pro V2 — $499.99–$549.99.

Lumbar support. The SIHOO Doro S300 lists “Dual dynamic lumbar support; angle 90°-105° fine-tuned with the gas lift”, the SIHOO Doro C300 Pro V2 “Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels”. The Doro S300's lumbar moves on its own as you shift, while the C300 Pro V2's is positioned by hand.

Armrests. The SIHOO Doro S300 lists “6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)”, the SIHOO Doro C300 Pro V2 “8D Bionic Armrests (up, down, forward, back, rotate, or tilt)”. With 8D armrests the C300 Pro V2 lets you set the pads in more ways than the Doro S300.

Recline. The SIHOO Doro S300 lists “Up to 130°; positions at 100°, 110° and 130°”, the SIHOO Doro C300 Pro V2 “Up to 135°; positions at 105°, 120° and 135°”. The C300 Pro V2 leans back further.

Footrest. SIHOO sells a Footrest Version of the C300 Pro V2; no such version is listed for the Doro S300.

Seat size. Seat height: the SIHOO Doro S300 lists “18.50–21.85 in (47–55.5 cm)”, the SIHOO Doro C300 Pro V2 nothing. Seat width: the SIHOO Doro S300 lists “20.28 in (51.5 cm)”, the SIHOO Doro C300 Pro V2 “20.5 in (≈52 cm)”. Seat depth: the SIHOO Doro S300 lists “15.75–18.50 in (40–47 cm)”, the SIHOO Doro C300 Pro V2 “16.9–18.5 in (≈43–47 cm)”.

Other details. For the Doro S300 and C300 Pro V2, the table above gives the headrest and chair weight in each brand's own wording.

Same on both. The Doro S300 and C300 Pro V2 list the same warranty (3 years) and maximum load (330 lb, ≈150 kg).

Who should buy which

• Pick the Doro S300 over the C300 Pro V2 if you want lumbar support that adjusts itself as you move, with nothing to set.
• Pick the C300 Pro V2 over the Doro S300 if you want the lower price — the C300 Pro V2 lists $500 below the Doro S300.
• Pick the C300 Pro V2 over the Doro S300 if you want 8D armrests rather than 6D.
• Pick the C300 Pro V2 over the Doro S300 if you want a lumbar position you set yourself and that stays put.

Not published by the brand (Doro S300 vs C300 Pro V2): seat height for the SIHOO Doro C300 Pro V2.

Sources

• SIHOO Doro S300 (compared here with the C300 Pro V2): Doro S300 Ergonomic Chair – UK Sihoo official Shop; Sihoo Doro S300 Zero Gravity Ergonomic Office Chair – Official US Sihoo Store, checked 2026-09-29; US list price from SIHOO US Official Store, checked 2026-10-07.
• SIHOO Doro C300 Pro V2 (compared here with the Doro S300): Sihoo Doro C300 Pro V2 Ergonomic Office Chair – Official US Sihoo Store, checked 2026-10-08; US list price from SIHOO US Official Store, checked 2026-10-08.
• Figures marked ≈ for the Doro S300 and C300 Pro V2 are Chairpedia's unit conversions, not brand figures.