Harrison Spinks Silver 6500 Pocket Mattress (Medium Feel)
The Harrison Spinks Silver 6500 is a pocket spring mattress built almost entirely from natural materials: British wool, cotton, hemp and flax, with a chemical-free fire retardant cover.
- Natural fibres help you stay cool
- Gives on contact, then firms up
- Cover free from chemical treatments
£849
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Beneath the Harrison Spinks Silver 6500's comfort layers sit 4,500 micro springs and a Cortec Quad Revolution system of 1,000 pocket springs, which means the surface contours closely to your body while the base moves independently under each sleeper. It's 29cm deep, handcrafted in the UK, and comes in five sizes. The retailer listing describes it as a soft to medium feel, so it leans a little gentler than a true medium, which suits side sleepers and lighter builds rather than those wanting firm pushback.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
29
Number of Layers
7
Trial Period (nights)
100
Warranty (years)
5
Price Range
£849 to £1,629
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes sense if you want natural materials without the usual chemical treatments. The cover meets fire safety standards without FR chemicals, and the wool, hemp and flax layers are there to breathe and wick moisture, which means you're less likely to overheat than on a foam-heavy design. The spring setup is genuinely clever: each of the 1,000 pocket springs contains a smaller spring inside it, grouped in fours, giving a progressive feel that softens on contact and firms up as you settle in. Yes, it's a real spend, but it buys UK handcrafting, a National Bed Federation approved brand, and construction that avoids foam almost entirely. Hot sleepers and eco-minded buyers are the natural audience here.
Key features & layer details
Cover
Woven in-house and free from fire retardant chemicals, meeting fire safety standards naturally. That means fewer chemical treatments next to your skin.
Wool comfort layer
Layers of British wool give a soft yet springy surface feel. Wool insulates in winter and breathes in summer, which helps regulate temperature year round.
British wool, hemp and flax blend
A further comfort layer that increases breathability. The blend is designed to reduce any build-up of mildew and mould.
Cotton, hemp and flax blend
This layer wicks moisture away and adds more airflow. Useful if you tend to sleep warm or share the bed.
Ecotex layer
Made from recycled fibres, this layer strengthens the mattress. It also keeps material out of landfill, a small but genuine sustainability point.
Micro springs
4,500 mini springs sit above the main unit for targeted, contoured comfort. Their small size means more contact points with your body, so pressure is spread more evenly.
Pocket springs
The Cortec Quad Revolution system uses 1,000 springs, each with a smaller spring inside, secured in groups of four. Pocketing lets each spring move independently, which means less disturbance when a partner shifts.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Side sleepers
The soft to medium feel and 4,500 micro springs contour closely to the shoulders and hips, so pressure is spread more evenly on your side.
Warm sleepers
Wool, hemp and flax layers breathe and wick moisture away, which means you are less likely to overheat than on a foam-heavy mattress.
Eco-conscious buyers
A cover free from fire retardant chemicals and an Ecotex layer made from recycled fibres keep the construction natural and largely foam-free.
Couples
Each of the 1,000 pocket springs moves independently, which means you feel less disturbance when your partner shifts or gets out of bed.
Lighter sleepers
The gentler soft to medium feel and springy wool surface give lighter builds enough softness to sink in comfortably without a firm push back.
The retailer describes this variant as a soft to medium feel, so heavier sleepers or anyone who prefers a firm, supportive surface may find it a little too yielding. It's also a poor fit for tight budgets, and for anyone who wants the hug of memory foam rather than a springy, natural feel.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Harrison Spinks Silver 6500 Pocket Mattress (Medium Feel)
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FAQ's
Is the Harrison Spinks Silver 6500 soft or medium?
The MattressOnline listing rates this variant as a soft to medium feel, despite the Medium Feel name. Expect a gentler surface than a classic medium, which suits side sleepers and lighter builds. Soft to medium, medium and firm options are listed if you need something different.
How many springs does the Harrison Spinks Silver 6500 have?
It uses 1,000 Cortec Quad Revolution pocket springs, each containing a smaller spring inside for a progressive feel, plus 4,500 micro springs above them for contoured comfort. The model name is branding rather than a spring count.
Does the Harrison Spinks Silver 6500 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 promise, so check the conditions wherever you buy.
How deep is the Harrison Spinks Silver 6500 mattress?
It's 29cm deep, so most standard fitted sheets should cope, though it's a substantial mattress. It's available in UK Single, Small Double, Double, King and Super King sizes.
Is delivery free on the Harrison Spinks Silver 6500?
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 and old mattress removal are both available for an extra charge. Other retailers may differ.
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