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)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
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, £849 upwards is 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 & what's inside
- 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.
Who's it NOT for?
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 at £849 upwards, and for anyone who wants the hug of memory foam rather than a springy, natural feel.
Harrison Spinks Silver 6500 Pocket Mattress (Medium Feel)
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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 costs £20, and old mattress removal is £35. Other retailers may differ.
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