Firmness
Medium
Type
Pocket Spring
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£1,399 to £2,779
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
That 16,500 spring count breaks down into two working parts: 15,800 mini pocket springs for surface comfort and airflow, plus 700 Cortec™ Quad springs grouped in fours for responsive support that adjusts to your weight, shape and movement. The natural fillings, which means no memory foam hug, give a more breathable, traditional feel that suits hot sleepers. Harrison Spinks is a National Bed Federation Approved Brand, and MattressOnline lists a 100-night trial and a 5-year guarantee with this mattress. Yes, it's a serious outlay, but you're paying for handcrafted UK construction and natural materials rather than synthetic foams. Sizes run from UK Single up to Super King.
Key Features & what's inside
- Comfort fillings. Layers of natural British wool, cotton, hemp and flax fibres sit at the sleep surface. One side places wool closer to the top for winter warmth, while the other includes moisture-wicking cotton for summer freshness, so you flip the mattress with the seasons.
- Mini Pocket Springs. A layer of 15,800 mini springs delivers bouncy comfort, with the small pockets creating airflow throughout the mattress. They reach areas that broader springs can miss, such as the hips and lower spine.
- Support System. At the base, 700 Cortec™ Quad springs are encased in cloth pockets and secured into groups of four. They're highly responsive, providing support based on your unique weight, shape and movement.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you want the slow-sinking, cradling feel of memory foam, this isn't it: natural fibres and springs give a more buoyant, traditional feel. It's also a considerable spend, so tighter budgets may be better served elsewhere. And the 5-year guarantee is shorter than some brands offer at this price.
Harrison Spinks Emerald 16500 Pocket Mattress (Medium Feel)
How many springs does the harrison spinks emerald 16500 have?
It has 16,500 springs in total: 15,800 mini pocket springs in the comfort layer for bounce and airflow, and 700 Cortec™ Quad springs in the support system, encased in cloth pockets and grouped in fours to respond to your weight, shape and movement.
Is the harrison spinks emerald 16500 soft or firm?
The MattressOnline listing offers a choice of firmnesses, from soft to medium through to firm, so you pick the feel when ordering. This is the medium version. If you're a lightweight side sleeper, the softer option may suit you better, while heavier sleepers might prefer firm.
Does the harrison spinks emerald 16500 come with a trial?
MattressOnline lists a 100-night trial and a 5-year guarantee with this mattress. These are the retailer's own terms rather than a manufacturer offer, so if you buy elsewhere, check that retailer's trial and returns policy before ordering.
What is the harrison spinks emerald 16500 made of?
The fillings are natural: British wool, cotton, hemp and flax, over mini pocket springs and Cortec™ Quad support springs. It's handcrafted in the UK, 29cm deep, and dual-sided, with a wool-rich winter side and a cotton summer side for temperature control across the year.
How long does delivery take for the harrison spinks emerald 16500?
MattressOnline offers free delivery to your front door within 7 weeks for mainland England and most of Scotland, Wales and Northern Ireland. Delivery to a room of your choice costs £20, and old mattress removal is £35. Other retailers will have their own delivery terms.
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