Firmness
Medium Soft
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 paying for a name alone. The wool, hemp and flax layers wick moisture and keep airflow moving, which means less overnight heat than foam-heavy designs. If you're a hot sleeper, that matters. The 4500 micro springs sit above the main 1000-spring unit and add contoured, close-contact comfort, so pressure points at the hips and shoulders get a softer landing. The cover is FR chemical-free, meeting fire safety standards naturally. At £849 to £1,629 depending on size it's a considered purchase, but the spring count and natural fillings justify the spend. Suits most back and side sleepers, although anyone who prefers a firm surface should look elsewhere.
Key Features & what's inside
- Cover. An in-house woven cover that's FR chemical-free, meeting fire safety standards naturally. That means fewer chemicals close to where you breathe all night.
- Wool comfort layer. Layers of British wool give a naturally soft yet springy feel. Wool insulates in winter and stays breathable in summer, so it works year round.
- British wool, hemp and flax blend. An additional comfort layer that increases breathability. It also helps reduce a build-up of mildew and mould over time.
- Cotton, hemp and flax blend. This layer wicks away moisture and adds further breathability. Useful if you tend to sleep warm or live somewhere damp.
- Ecotex layer. A sustainable layer made from recycled fibres that strengthens the mattress. It also keeps material out of landfill.
- Micro springs. 4500 mini springs provide targeted, contoured comfort. Their small size means more contact points with your body and better airflow through the mattress.
- Pocket springs. 1000 Cortec Quad Revolution springs, each with a smaller spring inside and secured in groups of four. They move independently, which means your partner's tossing shouldn't reach your side of the bed.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you like a firm, supportive surface, this Soft to Medium feel will likely be too forgiving, particularly for heavier stomach sleepers who need to keep their hips level. And if you're on a tight budget, the from-price of £849.00 puts it beyond entry-level territory.
Harrison Spinks Silver 6500 Pocket Mattress (Soft to Medium Feel)
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How firm is the Harrison Spinks Silver 6500 mattress?
It has a Soft to Medium feel. That gentler surface suits side sleepers and lighter bodies well, as it lets shoulders and hips sink slightly for pressure relief. If you prefer to sleep on top of a firmer, flatter surface, this probably isn't the one for you.
How many springs does the Harrison Spinks Silver 6500 have?
It uses 1000 Cortec Quad Revolution pocket springs as the main support unit, with each spring containing a smaller spring inside it. Above that sits a layer of 4500 micro springs for closer, contoured comfort.
Does the Harrison Spinks Silver 6500 come with a trial period?
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 retailer's returns terms before ordering.
Is the Harrison Spinks Silver 6500 good for hot sleepers?
It's a strong choice if you sleep warm. There's no memory foam to trap heat; instead the wool, cotton, hemp and flax layers wick moisture and breathe, and the micro springs allow air to move through the mattress.
How long is the guarantee on the Harrison Spinks Silver 6500?
The MattressOnline listing states a 5-year guarantee, matching the warranty other retailers list. As this comes from a retailer's page rather than the brand's own site, it's sensible to confirm guarantee terms with whichever retailer you buy from.
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