● REF · SIHOO-PRIME-DAY-2026FIG. 01 — SUMMER COLLECTION

Live now · sale runs June 3 – 30

Sihoo Prime Day Sale, 2026 edition.

Sihoo's biggest sale of the year is running on the brand's official US store. The newly launched Doro C300 Pro V2 is the campaign hero, and two coupon codes stack on top of the Prime Day pricing.

Chairs on sale

Price range

$100–$680

Stack codes

JUN 3 — JUN 302026 · sihoooffice.com

Shop the Prime Day collection

Fig. 02

Stack a code at checkout

both work through June 30

Code No. 01Sihoo · Prime Day

ASJ7PX

$20twenty dollars off

Applies toDoro S300 · Doro C300 Pro

Stack ruleStacks on top of Prime Day sale pricing.

Wheresihoooffice.com checkout

Valid through Jun 30

Code No. 02Sihoo · Prime Day

SMWTJ

$10ten dollars off

Applies toDoro C300 · Doro S100 · V1

Stack ruleStacks on top of Prime Day sale pricing.

Wheresihoooffice.com checkout

Valid through Jun 30

Fig. 03

Campaign hero

the newly launched Doro C300 Pro V2

Just Released

Sihoo

Sihoo Doro C300 Pro V2 Ergonomic Chair

Best new release: the C300 Pro rebuilt around adaptive, full-body support

$499.99

Armrests8D armrestsRecline105/120/135 degreesCapacity330 lbsWarranty3 years

8D bionic armrests move in eight directions, including 360-degree rotation and a tilt that supports your forearms while reclined
Self-Adaptive Dynamic Lumbar Support 2.0 widens the contact area and adds a pressure-relief spring with three fine-tuning positions
DynaCore and SyncroFlex flex the backrest with your spine through the full recline arc
Smart Mechanism 2.0 auto-calibrates recline resistance to your body weight, no manual tension dial

See it on Sihoo

Sold by Sihoo · price + availability live

Fig. 04

The rest of the sale

six more chairs on the broadside

Best Premium

Sihoo

Sihoo Doro S300 Ergonomic Chair

Best premium pick: the flagship for all-day support

$679.99$799.99Save $120

Armrests4D armrestsReclineAnti-Gravity tiltCapacity300 lbsWarranty5 years

Anti-Gravity recline mechanism distributes body weight evenly across the recline arc
Self-adaptive dynamic lumbar tracks your spine without manual tweaking
4D coordinated armrests plus an adjustable headrest included standard

See it on Sihoo

Best Upgrade

Sihoo

Sihoo Doro C300 Pro Ergonomic Chair

Best upgrade pick: the C300 with every dial turned up

$359.99$599.99Save $240

ReclineMulti-tilt lockCapacity300 lbsArmrests6D armrestsWarranty5 years

6D coordinated armrests with an Upside Mode that supports your arms while reclined
Self-adaptive dynamic lumbar (the C300 uses a static system)
Seat-depth adjustment keeps long legs supported and short legs free

See it on Sihoo

Best Value

SIHOO

Sihoo Doro C300 Ergonomic Chair

Best value pick: the chair everyone actually recommends

$269.99$319.99Save $50

ReclineTilt + lockCapacity300 lbsArmrests3D armrestsWarranty5 years

Self-adaptive lumbar support adjusts to your spine as you move
3D coordinated armrests and a breathable full-mesh build
Adjustable headrest included standard

See it on Sihoo

Best Entry-Premium

Sihoo

Sihoo Doro S100 Ergonomic Chair

Best entry-premium pick: Doro features at a mid-range price

$239.99$549.99Save $310

Armrests4D armrestsCapacity286 lbsReclineIndependent backrestWarranty5 years

Dual dynamic lumbar system supports the lower back from two contact zones
Independent backrest flexes with your movement instead of staying rigid
4D coordinated armrests, rare at this price

See it on Sihoo

Best Budget

Sihoo

Sihoo M18 Ergonomic Chair

Best budget pick: the chair that made Sihoo a household name

$149.99$199.99Save $50

Warranty1 yearCapacity330 lbsArmrests2D armrestsReclineTilt + lock

W-shape cushion cradles the hips and takes pressure off the tailbone
Breathable mesh seatback runs cool through long sessions
Dual-adjustable lumbar support, uncommon under $150

See it on Sihoo

Best Under $100

Sihoo

Sihoo M76 Ergonomic Chair

Cheapest way in: a real ergonomic chair under $100

$99.99$159.99Save $60

Warranty1 yearCapacity286 lbsArmrestsFold-up armrestsReclineUp to 120 degrees

A genuine ergonomic chair under $100
C-shaped backrest reclines up to 120 degrees
Armrests fold up to tuck the chair under a desk or into a small room

See it on Sihoo

Fig. 05

Frequently asked

Q.01

When does the Sihoo Prime Day Sale end?

The campaign runs June 3 through June 30, 2026. Prices on Sihoo's official US store reflect the sale automatically, and both coupon codes work through the end date.

Q.02

Is the new Doro C300 Pro V2 part of the sale?

Yes. The C300 Pro V2 launched alongside Prime Day and is the campaign hero. It rebuilds the C300 Pro around DynaCore support, 8D bionic armrests, and a recline that auto-calibrates to your body weight. See the full breakdown in the C300 Pro V2 review.

Q.03

How do I use the coupon codes?

Add a chair to your cart on sihoooffice.com and paste the code at checkout. ASJ7PX takes $20 off the premium Doro chairs (S300, C300 Pro), and SMWTJ takes $10 off the value picks (C300, S100, V1). Codes apply on top of the Prime Day sale pricing.

Q.04

Is Sihoo Prime Day the same as Amazon Prime Day?

No. Sihoo runs its own Prime Day promotion on its official US store at sihoooffice.com. Sihoo's Prime Day typically runs ahead of and through Amazon's mid-July Prime Day, with deeper discounts on the chairs because you buy direct from the brand.

Q.05

Which Sihoo chair should I get during the sale?

For most people, the standard Doro C300 at around $270 is the best balance of value and ergonomics with the dynamic lumbar. If you sit for full days and want adaptive support, the new C300 Pro V2 at around $500 adds 8D armrests and the auto-calibrating recline. The flagship Doro S300 at $680 is the top of the line. The full lineup is broken down here.

● COLOPHON · ATTRIBUTIONFIG. 06

Disclosure · Every chair links to Sihoo's official US store through our affiliate partnership with Sihoo via Impact. Sale pricing and coupon codes come straight from Sihoo's Prime Day campaign feed. We earn a commission if you buy, at no cost to you.

The full Sihoo lineup →C300 Pro V2 review →Best chairs under $600 →Best chairs under $400 →