🎉Prime Mega Sale | £20 OFF with CODE: PD20

120-Day Money-Back Guarantee I 3-Year Warranty

Prime Day Sale

🎉 Prime Day Exclusive Rewards & Savings

Official Store Exclusive — Better Prices, More Rewards, More Benefits

Purchase & Win Draw

Purchase & Win Draw

Unlock £20 OFF

Unlock £20 OFF

120-Day Money-Back Guarantee

120-Day Money-Back Guarantee

3-Year Warranty

3-Year Warranty

🎁 Special Giveaway on the C300 Pro V2
Buy a C300 Pro V2 for a chance to win a refund on one unit.
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📜 RULES

Free Order Rules

This promotion is a lucky draw with 10 winners. Each winner will receive a full refund for one C300 Pro V2 unit. Customers who place and successfully pay for an order during the promotion period are eligible to enter the draw.

Draw Date

The draw will take place on July 6, 2026. Ten winners will be selected. Each winner will receive a refund for one purchased product. The maximum refund amount per winner is £509. If the value of the refunded product exceeds £509, any amount above £509 will not be refunded.

Conditions

All valid orders placed and paid between June 3, 2026, 08:00 BST and July 1, 2026, 08:00 BST are eligible for the draw. Orders successfully paid within this period are considered valid entries.

Additional Terms & Conditions

One Prize Per Customer

Each eligible customer may receive only one prize throughout the promotion period, subject to the conditions above. If a customer qualifies for multiple prizes, only the first prize won will be awarded.

Non-Transferable

The promotional prize is non-transferable and cannot be assigned to others.

Promotion Period

This promotion is valid for orders placed and successfully paid between June 3, 2026, 08:00 BST and July 1, 2026, 08:00 BST. Any order not fully paid by July 1, 2026, 08:00 BST, or canceled within the following 7 days, will be disqualified.

Refunds and Maximum Prize Value

Any order for which a refund is requested (e.g., due to a return) will be disqualified from the promotion. Additionally, the maximum refund amount per winner is £509.

Disqualification Due to Fraudulent Activity

Customers found engaging in fraudulent activity or attempting to manipulate the promotion through technical means will be disqualified and banned from all future Sihoo promotions.

Disclaimer

Sihoo is not responsible for any issues arising wholly or partially from technical difficulties (including but not limited to internet services, servers, hardware, software, or websites), such as lost, delayed, or corrupted data transmitted or attempted to be transmitted by participants.

Taxes

Each winner is solely responsible for any applicable federal, state, or local sales, income, or other taxes.

Release and Liability Waiver

Each winner releases Sihoo and all related parties (including Sihoo’s representatives and independent contractors) from any liability, claims, or actions arising from participation in the promotion or from the receipt, possession, use, or misuse of the refund prize.

Modifications

To the extent permitted by law, Sihoo reserves the right to modify the promotion rules. Sihoo will strive to resolve disputes through negotiation but reserves the right of final interpretation.

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🎁 Promotion Details

🎉 Free Order Draw Rules:

This promotion is a lucky draw with 10 winners. Each winner will receive a full refund for one C300 Pro V2 unit. Customers who place and successfully pay for an order during the promotion period are eligible to enter the draw.

Draw Date

The draw will take place on July 6, 2026. Ten winners will be selected. Each winner will receive a refund for one purchased product. The maximum refund amount per winner is £509. If the value of the refunded product exceeds £509, any amount above £509 will not be refunded.

Conditions

All valid orders placed and paid between June 3, 2026, 08:00 BST and July 1, 2026, 08:00 BST are eligible for the draw. Orders successfully paid within this period are considered valid entries.

Additional Terms & Conditions

One Prize Per Customer

Each eligible customer may receive only one prize throughout the promotion period, subject to the conditions above. If a customer qualifies for multiple prizes, only the first prize won will be awarded.

Non-Transferable

The promotional prize is non-transferable and cannot be assigned to others.

Promotion Period

This promotion is valid for orders placed and successfully paid between June 3, 2026, 08:00 BST and July 1, 2026, 08:00 BST. Any order not fully paid by July 1, 2026, 08:00 BST, or canceled within the following 7 days, will be disqualified.

Refunds and Maximum Prize Value

Any order for which a refund is requested (e.g., due to a return) will be disqualified from the promotion. Additionally, the maximum refund amount per winner is £509.

Disqualification Due to Fraudulent Activity

Customers found engaging in fraudulent activity or attempting to manipulate the promotion through technical means will be disqualified and banned from all future Sihoo promotions.

Disclaimer

Sihoo is not responsible for any issues arising wholly or partially from technical difficulties (including but not limited to internet services, servers, hardware, software, or websites), such as lost, delayed, or corrupted data transmitted or attempted to be transmitted by participants.

Taxes

Each winner is solely responsible for any applicable federal, state, or local sales, income, or other taxes.

Release and Liability Waiver

Each winner releases Sihoo and all related parties (including Sihoo’s representatives and independent contractors) from any liability, claims, or actions arising from participation in the promotion or from the receipt, possession, use, or misuse of the refund prize.

Modifications

To the extent permitted by law, Sihoo reserves the right to modify the promotion rules. Sihoo will strive to resolve disputes through negotiation but reserves the right of final interpretation.

Claim Your Coupon

Extra £20 OFF
Valid on All Products Sitewide
CODE PD20

Enjoy a 120-Day Price Guarantee

Shop with confidence. If the price drops within 120 days, you may request a refund for the price difference. Valid only for orders placed during the Prime Day promotion.

Enjoy a 120-Day Price Guarantee

Shop with confidence. If the price drops within 120 days, you may request a refund for the price difference. Valid only for orders placed during the Prime Day promotion.

Why Shop at the SIHOO Online Store?

Exclusive benefits for every shopper

FAST SHIPPING

FAST SHIPPING

SATISFACTION GUARANTEE

SATISFACTION GUARANTEE

3-YEAR WARRANTY

3-YEAR WARRANTY

120-Day Money-Back Guarantee

120-Day Money-Back Guarantee

PREMIUM ERGONOMIC CHAIRS

UP TO 38% OFF

As SIHOO's flagship ergonomic chair series, the C Series has won customer recognition for its automatic lumbar support function.

ERGONOMIC OFFICE CHAIRS

UP TO 18% OFF

A high-quality, ergonomic entry-level office chair - ideal for office workers who spend long periods of time sitting.

-17% OFF
M57 Classic Office Chair M57 Classic Office Chair
£189.99 £229.99
Shop Now
-11% OFF
M18 Classic Office Chair M18 Classic Office Chair
£149.99 £169.99
Shop Now
-18% OFF
Sihoo M102C Ergonomic Chair Sihoo M102C Ergonomic Chair
£129.99 £159.99
Shop Now

Buy more and save more!

Take advantage of our ‘Buy More, Save More’ offer. Outfit entire departments or your whole office today and create an environment where productivity and well-being thrive.

Buy 3~5 Extra 3% OFF

Buy 6~9 Extra 5% OFF

Buy 10+ Extra 10% OFF

The discount will be automatically applied at checkout!

Help Me Choose

Products

Doro C300 Ergonomic Office Chair

£249.99
£339.99
View more

Doro C300 Pro Ergonomic Office Chair

£359.99
£589.99
View more

Doro S300 Ergonomic Office Chair

£519.99
£539.99
View more

Doro S100 Ergonomic Office Chair

£229.99
£249.99
View more

Headrest

3D mechanical headrest

3D mechanical headrest

Ultra-wide integrated headrest

Ultra-wide integrated headrest

Lumbar support

Self-adaptive dynamic lumbar support

Self-adaptive dynamic lumbar support

Dual dynamic lumbar support with 90°-105° customization

Dual dynamic lumbar support

Recline angle

110°, 120°, 130°

105°, 120°, 135°

100°, 110°, 130°

98°-135°

Armrests

4D coordinated

6D coordinated

6D coordinated

4D coordinated

Seat width

49.5 cm (19.49 in)

51.5 cm (20.28 in)

51.5 cm (20.28 in)

51 cm (20.08 in)

Seat height

47 - 55 cm (18.50 - 21.65 in)

46.5 - 56 cm (18.31 - 22.05 in)

47 - 55.5 cm (18.50 - 21.85 in)

46 - 54 cm (18.11 - 21.26 in)

Mesh material

High-elasticity wave mesh

High-elasticity wave mesh

Italian velvet, DuPont TPEE

High-elasticity wave mesh

INNOVATIVE & TRUSTWORTHY

Featured Media

Sihoo's Office Chair Is An Affordable Alternative To Herman Miller's Classic Aeron.

World's Leading Ergonomic Chair Brand

122+

Countries. Recognized worldwide.

2000+

Certifications by renowned media worldwide

2.6M+

Customer Recognition

15

Years of Company History

FAQs

When does the Prime Day Sale start and end?

The Prime Day Sale starts at 8:00 AM BST on 3 June 2026 and ends at 8:00 AM BST on 1 July 2026.

Can I enter the giveaway if I purchase the C300 Pro V2?

Yes. Customers who purchase the C300 Pro V2 during the Mega Sale period will automatically be entered into a prize draw for a chance to win a free unit. Please refer to the promotion rules for full details.

Can coupons be combined?

No, all coupons are non-stackable. Only one coupon can be used per order.

What is Price Protection during the Prime Day Mega Sale?

Yes. If the price drops within 120 days after your purchase, you may be eligible for a price adjustment. Price protection is based on the listed selling price shown on the site and does not include coupon codes, promotional discounts, or other savings applied at checkout.

How long does shipping take and is delivery free?

·Free delivery on all UK orders (no minimum spend)
·Standard: 3–9 working days
·Remote areas (Highlands & Islands): may take longer
·Tracking is provided for all orders