Current offer comparison — October 22, 2026 snapshot
These are DealsChecked feed observations collected at 01:39 UTC, not completed checkout tests. Cards can refresh separately. The merchant confirms the final price, seller, shipping, tax and return terms.
| Use | Product | Feed price | Feed discount | Offer type | Action |
|---|---|---|---|---|---|
| Adjustable seat depth and lumbar | SIHOO Doro C300 Pro V2 Ergonomic Office Chair, Full-Body Adaptive SupportShop on Amazon Details | $439.99 | 20% | Promo code: SIHOOC300CTV | Shop on Amazon |
| Footrest and flip-up arms for less | SIHOO B100 PRO Ergonomic Mesh Office Chair with FootrestShop on Amazon Details | $188.99 | 37% | Promo code: SIHOOB100PKE | Shop on Amazon |
How to choose between the Doro C300 Pro V2 and B100 PRO
Both are current SIHOO high-back chairs with the same load rating, maximum recline and warranty, so the comparison isolates seat-depth, armrest and lumbar adjustment and the footrest against price.
Before opening either offer, measure from the back of your knee to your lower back: if a standard seat leaves either too much or too little gap, the Doro's adjustable seat depth is the reason to pay more.
What the Doro adds
SIHOO lists the Doro C300 Pro V2 with a 20.5 inch seat width and a 16.9 to 18.5 inch seat depth range. SIHOO lists 8D bionic armrests and a 3D headrest that adjusts in three directions on the Doro C300 Pro V2. SIHOO says the Doro C300 Pro V2's Domino 2.0 lumbar support offers 3 support levels, from softer to firmer. SIHOO's B100 PRO page lists no seat-depth range, so the Doro is the one of the two you can fit to longer or shorter thighs.
What the B100 PRO offers and what both share
SIHOO lists the B100 PRO with 4D flip-up armrests and a wide 3D-adjustable headrest. SIHOO describes the B100 PRO's back support as responsive lower-back support for the lower back and the area below it. SIHOO sells the B100 PRO in a Footrest Version and a Standard Version. The B100 PRO offer in this comparison is the footrest listing, while the Doro offer is the version without one. SIHOO lists 3 recline positions up to 135°, a 330 lbs maximum load, general dimensions of 27.6"W x 28.3"D x 44.1"-51.6"H and a 3-year warranty for the B100 PRO. SIHOO lists recline angles of 105°, 120° and 135°, a maximum load of up to 330 lbs and a 3-year warranty for the Doro C300 Pro V2, which it sells in Standard and Footrest Versions.
Who should buy each chair
The Doro costs $251.00 more in this snapshot. For six or more hours a day, people whose thigh length does not suit a fixed seat, or anyone who wants to tune lumbar firmness, get the most from the Doro. For mixed desk work with breaks to recline, the B100 PRO's footrest and flip-up arms cover most needs for less than half the price. Both codes are recorded as ending at 12:00 a.m. Eastern on October 31, 2026.
Another brand we checked
We also checked a chair from another brand. HBADA lists the P2 Ergonomic Office Chair at a $224.00 sale price with 360° rotating armrests, a 140° recline and a 5-year warranty, but its page gives both 330 and 300 pounds as the maximum weight. We kept this guide to the two SIHOO chairs in the title.
FAQ
Which selected offers are current?
2 current offers are confirmed for the selected products: $188.99–$417.99. Current codes: SIHOOC300CTV, SIHOOB100PKE.
Which of the two chairs lets me adjust seat depth?
The Doro C300 Pro V2. SIHOO lists a 16.9 to 18.5 inch seat depth range for it; its B100 PRO page lists no seat-depth range.
Do both offers include a footrest?
No. The B100 PRO offer here is the footrest listing, while the Doro C300 Pro V2 offer is the version without a footrest. SIHOO sells both chairs in Standard and Footrest Versions.
Do I need a promo code for these prices?
Yes. Each table price is the feed price with the listed code applied, and both codes are recorded as ending at 12:00 a.m. Eastern on October 31, 2026.
Sources and method
The SIHOO Doro C300 Pro V2 page , SIHOO B100 PRO page and HBADA P2 page were checked October 22, 2026 UTC. Offer values are dated feed observations collected at 01:39 UTC. We have not tested these products ourselves; performance figures are manufacturer ratings.