Halloween is here — and there’s nothing scarier than back pain and bad posture. This season, treat yourself to real comfort with Sihoo’s ergonomic chair deals in the UK — designed to keep you supported through work, study, and gaming.
From 13 to 31 October 2025, our sitewide spend-and-save offer lets you enjoy automatic discounts at checkout — no promo code needed!
Halloween Discount Tiers:
- - Spend £100 → Save £10
- - Spend £200 → Save £25
- - Spend £300 → Save £40
- - Spend £600 → Save £100
- - Spend £1200 → Save £250
Your discount is automatically applied based on your basket subtotal (excluding shipping and gift cards).
Why Choose Sihoo Ergonomic Chairs
Because comfort is the ultimate treat. Each Sihoo chair is engineered with ergonomic science to support your spine and enhance your productivity — all wrapped in modern design and durable materials.
- Adaptive lumbar support that responds to your movement
- 4D armrests for multi-angle adjustability
- Breathable elastic mesh for cool, long-lasting comfort
- Free UK shipping + 30-day returns + 3-year warranty
Meet the Stars of the Season
Sihoo Doro C300 — Smart Ergonomics for Every Body
The Doro C300 is Sihoo’s best-in-class ergonomic chair, built for total comfort and precision support.
Key Specifications & Features:
- Adaptive Lumbar Cushion — automatically adjusts to your spine for consistent support
- 3D Mechanical Headrest — wide and angle-adjustable for all users
- 4D Armrests — height, depth, width and rotation adjustments
- Waterfall Seat Design — reduces pressure on hips and thighs
- Intelligent Gravity Mechanism — balances weight for effortless recline
- Breathable Elastic Mesh — soft yet supportive, ideal for long hours
- Weight capacity: up to 136 kg (300 lbs)
"It moves with you — not against you."
Available now in the Halloween Sale — save up to £250 automatically!
Doro C300 Ergonomic Office Chair
Engineered with adaptive lumbar support, 4D adjustable armrests, and a breathable mesh design, the Doro C300 delivers all-day ergonomic comfort and effortless recline.
Sihoo Doro S100 — Dual Dynamic Support, Pure Comfort
The Doro S100 takes ergonomics to the next level with its Dual Dynamic Lumbar Support system, which adapts to your lower back in real time.
Key Specifications & Features:
- Dual Dynamic Lumbar Support — responsive dual-spring system for tailored comfort
- 5-Level Adjustable Back Height — perfect fit for different body types
- Seat Depth Adjustment — up to 5 cm to accommodate various leg lengths
- 4D Armrests — multi-directional movement for personalised support
- Reclining angle up to 135° for work, relax, and nap modes
- High-density mesh for ventilation and durability
- Weight capacity: ≈ 136 kg
Perfect for professionals who want premium comfort without premium prices.
Enjoy Halloween sitewide discounts applied automatically at checkout!
Sihoo S100 Ergonomic Office Chair
Featuring dual dynamic lumbar support, 5-level adjustable back height, and flexible 4D armrests, the Doro S100 adapts perfectly to your posture for lasting comfort and balance.
Sihoo M59AS — Smart, Space-Saving and Supportive
Compact yet powerful, the M59AS is designed for dynamic workspaces and home offices.
Key Specifications & Features:
- Dual-Section Backrest — separate zones for upper and lower spine support
- Adaptive Lumbar Support — keeps your lower back aligned during long sessions
- 3D Flip-Up Armrests — fold up to save space or down for support
- Height Adjustable Headrest and Seat — for custom fit
- Breathable mesh fabric for cool comfort
- BIFMA & SGS certified for safety and durability
- Height range: 111 – 119 cm, seat width 47 cm
Compact comfort that packs a punch — ideal for smaller workspaces or shared desks.
Grab yours during the Halloween Sale — discounts auto-applied!
Sihoo M59AS Ergonomic Office Chair
The Sihoo M59AS ergonomic chair, with its dual-section backrest, reversible 3D armrests, and adaptive lumbar support, is perfect for home offices seeking comfort and space efficiency.
How to Save More This Halloween
- Add your favourite Sihoo chair(s) to your basket.
- Proceed to checkout — your tiered discount applies automatically.
- Enjoy free UK delivery and Sihoo’s 30-day return guarantee.
Offer valid until 31 October 2025 — once it’s gone, it’s gone!
Sihoo — Sit Better, Live Better
Join over 10 million Sihoo users worldwide who trust our ergonomic chairs for a healthier and more productive lifestyle.
This Halloween, make a smart move for your comfort and your wallet.
Shop the Sihoo Halloween Sale Today！！！
FAQs
How does the Halloween discount work?
The discount applies automatically at checkout based on your total spend—no promo code needed.
Which chairs are included in the sale?
Top models like the Doro C300, Doro S100, and M59AS are all part of the Halloween offer.
When does the offer end?
The Sihoo Halloween Sale runs until October 31, 2025, while stocks last.
