SIHOO B300 Pro Ergonomic Office Chair with Footrest, 4-Way Lumbar Support

£339.99

Advanced Ergonomic Executive Chair with Retractable Footrest | Self-Adaptive 4-Way Lumbar & Height-Adjustable Backrest for Full Spine Alignment, 6D Motion Armrests & Seat Slider for All-Day Work & Rest Comfort (Black)

28 in stock

Shipping Policy

Free standard shipping, everywhere in the UK

We keep shipping simple: every order ships free, with no minimum spend required, anywhere in the United Kingdom.

Delivery timeline

  • Processing time: 1–2 business days to prepare your order before it ships.
  • Delivery time: 1–7 business days once dispatched.
  • Business days are Monday to Friday, excluding UK bank holidays.

How you’ll know where your order is

Once your order ships, we’ll email you tracking information so you can follow its progress right up to your door.

One shipping option, for everyone

We currently offer a single shipping method — free standard delivery — for all orders and all UK postcodes. There’s no express or next-day option at this time, so the 1–7 business day window applies across the board.

If your delivery is taking longer than expected

If it’s been more than 7 business days since dispatch and your order hasn’t arrived, contact us at support@sgislandcart.com or +44 1372 463099 with your order number, and we’ll look into it with the courier right away.

Return & Refund

You have 30 days from the date of delivery to return your order for a full refund — no reason needed. This is more generous than your minimum legal right to cancel under UK law, so by offering 30 days, we already cover that requirement in full.

What condition the item needs to be in

You’re welcome to open the packaging and check the item the way you would in a physical shop. If it comes back showing signs of use beyond this — for example, worn, installed, or damaged — we may deduct an amount from your refund to reflect the reduction in value. We’ll always explain clearly why, and how much, before finalising any deduction.

How to return an item

  1. Email support@sgislandcart.com within 30 days of delivery, with your order number and the reason for return.
  2. We’ll confirm the process and give you a returns address.
  3. Pack the item securely, ideally in its original packaging, and send it back.
  4. Once we receive and inspect it, we’ll refund you to your original payment method within 7 days.

If something arrives faulty, damaged, or incorrect

This isn’t limited to the 30-day window. Under the Consumer Rights Act 2015, you’re entitled to a repair, replacement, or refund for a faulty, damaged, or incorrect item, and we’ll cover the return cost in full — you won’t be out of pocket. Contact us within 30 days of delivery for the fastest resolution; your legal rights for faulty goods continue beyond this period too.

Items we cannot accept for return

For hygiene and safety reasons, items that have been opened, used, or are not in resaleable condition cannot be returned unless faulty. Items marked “Final Sale” at purchase are also excluded unless faulty.

Your rights are not limited by this policy

Nothing here reduces your statutory rights under UK consumer law. If anything in this policy conflicts with your legal rights, your legal rights take priority.

Questions about a return?

Email support@sgislandcart.com or call +44 1372 463099, with your order number for the fastest response.

About this item

  • 【LUMBAR SUPPORT THAT MOVES WITH YOU】 Your posture changes constantly throughout the day—your lumbar support should too. The B300 PRO ergonomic office chair features a spring-assisted 4-way lumbar system that adjusts in height, glides forward independently, and flexes with every movement to stay aligned with your lower back. Whether you’re diving into focused work, switching between meetings, or reclining to recharge, it delivers continuous support that helps relieve pressure and keeps you comfortably centered from morning to night.
  • 【A BACKREST BUILT AROUND YOU】 Great ergonomics begin with a chair that adapts to you—not the other way around. The independently height-adjustable backrest lets users of different heights fine-tune where lumbar support meets the spine, creating a more natural sitting posture and full-back contact. From your home office to a shared workspace, every adjustment brings balanced support that feels personalized, stable, and effortless throughout the day.
  • 【SIT DEEPER. FEEL LIGHTER.】 Comfort starts where pressure ends. The adjustable seat depth helps evenly distribute body weight while providing better thigh support for different leg lengths, reducing fatigue during extended sitting. Whether you’re powering through deadlines, studying for hours, enjoying immersive gaming, or simply settling in with a good book, the breathable mesh seat keeps you cool, supported, and comfortably focused without constant repositioning.
  • 【RECLINE WITHOUT THINKING】 Your chair should respond as naturally as your body moves. The smart weight-sensing recline automatically matches your body weight, delivering smooth, balanced resistance without manual tension adjustments. Shift from focused tasks to creative thinking, lean back between meetings, or pause for a quick break—the chair follows your movement seamlessly, so every position feels stable, supported, and completely intuitive.
  • 【SUPPORT FROM HEAD TO ARM】 Comfort is built from every point of contact. The oversized 3D headrest adjusts to support your neck during long video calls, reading, or quiet moments of relaxation, while the 6D armrests rotate, slide, lift, and flip up to match everything from typing and creative work to gaming or sitting cross-legged. Together, they help keep your neck, shoulders, and arms naturally aligned—so comfort stays with you no matter how you work or unwind.
Material Type Mesh
Frame Material Type Aluminum
Product Care Instructions Wipe Clean
Seat Material Type Mesh
Sleeping Bag Filling Material Polyester
Fabric Type Mesh
Upholstery Fabric Type Mesh
Is Assembly Required? Yes
Colour Light Black
Back Style Split Back
Style Name Modern
Pattern Solid
Finish Type Polished
Theme OFFICE
Item Shape L-Shape
Arm Style 6D Flip-up
Cushion Style Knife Edge
Form Factor Recliner
Item Dimensions D x W x H 72D x 70W x 131H centimetres
Size Pack of 1
Item Weight 19.8 Kilograms
Unit Count 1.0 count
Seat Back Interior Height 8.5 Centimetres
Seat Height 55.3 Centimetres
Seat Depth 47 centimetres
Seat Length 48 Centimeters
Arm Height 73.5 Centimetres
Chair Backrest Width 62 Centimetres
Item Dimensions 47 x 48.5 x 122 centimetres
Special Features Adjustable Backrest, Adjustable Headrest, Adjustable Height, Adjustable Lumbar, Ergonomic
Furniture Base Movement Swivel
Reclining Position Count 135
Tilting Yes
Is Customizable? No
Is Foldable No
Number of Height Positions 3

 

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