Firmness
Medium Soft
Type
Pocket Spring
Depth (cm)
29
Number of Layers
5
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.
The main draw here is the natural build. Layers of British wool, hemp, flax and cotton do the comfort work rather than foam, which means better breathability and temperature regulation if you tend to sleep warm. The Cortec™ Quad springs respond to your weight and shape individually, so couples should notice less motion transfer than on a traditional sprung bed. It carries National Bed Federation approval and is handcrafted in the UK. Yes, £1,399 to £2,779 is a serious spend, but the sheer volume of springs and the all-natural fillings go some way to justifying it. MattressOnline lists a 100-night trial with this mattress, which takes some of the risk out of a purchase this size.
Key Features & what's inside
- Comfort fillings. Layers of natural British wool sit at the top, shaping around your body as you settle. Wool is naturally breathable, so it cushions without trapping heat.
- Comfort fillings blend. Beneath the wool sits a blend of British wool, hemp and flax. This mix helps regulate temperature, which means you're less likely to be woken by warm nights or cold snaps.
- Comfort fillings blend. A further blend of cotton, hemp and flax fibres adds soft, breathable padding. It keeps the comfort layers airy rather than dense.
- Support system. 700 Cortec™ Quad springs, encased in cloth pockets and secured in groups of four, form the core. They respond to your weight, shape and movement individually, so support adjusts to you rather than the person next to you.
- Mini springs. 15,800 mini springs deliver a slightly bouncy comfort layer with small pockets for airflow throughout the mattress. They add responsiveness where foam layers would simply compress.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This soft to medium version won't suit anyone who needs a firm sleeping surface, particularly heavier back and front sleepers who may sink too far for proper spinal alignment. It's also a poor fit for tight budgets, with prices starting at £1,399, and for anyone wanting a longer guarantee than five years.
Harrison Spinks Emerald 16500 Pocket Mattress (Soft to Medium Feel)
How firm is the Harrison Spinks Emerald 16500?
This version has a soft to medium feel, which suits side sleepers and lighter bodies who want gentle cushioning. The retailer listing notes the model is also available in Medium and Firm options, so heavier sleepers or back sleepers can choose a more supportive version of the same build.
Does the Harrison Spinks Emerald 16500 come with a trial?
MattressOnline lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Harrison Spinks guarantee, so if you buy elsewhere, check that seller's returns terms before ordering.
How many springs does the Emerald 16500 have?
16,500 in total: 700 Cortec™ Quad springs grouped in fours form the main support system, with 15,800 mini springs layered above for bouncy comfort and airflow. In practice this means responsive, closely tailored support rather than the broad push-back of a traditional sprung mattress.
Is the Harrison Spinks Emerald 16500 good for hot sleepers?
It should be a strong option. The fillings are British wool, cotton, hemp and flax, all naturally breathable fibres, and the mini springs create small air pockets throughout the mattress. There's no foam layer to trap heat against your body.
What guarantee does the Emerald 16500 have?
The listing shows a 5-year guarantee. That's shorter than some premium mattresses offer, which is a little disappointing at this price, so factor it into your decision if long-term cover matters to you.
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