Harrison Spinks Ruby 12500 Pocket Mattress (Soft to Medium Feel)
The Harrison Spinks Ruby 12500 is a pocket spring mattress with a soft to medium feel, handcrafted in the UK from British wool, hemp, flax and cotton.
- Natural fillings sleep cooler than foam
- Suits side sleepers & lighter builds
- Eases pressure at shoulders & hips
£1,249
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The Harrison Spinks Ruby 12500's 12,500 springs are arranged in layers, which means support comes from the springs themselves rather than foam, giving a naturally breathable, responsive feel. It's 29cm deep and sits at the premium end, although the natural fillings and spring count go some way to justifying that. If you prefer a gently cushioned surface over a firm one, this is the sort of feel it delivers. Heavier sleepers who need a firmer edge of support may want to look at firmer options in the range.
Mattress specifications
Firmness
Medium Soft
Type
Pocket Spring
Depth (cm)
29
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
5
Price Range
£1,249 to £2,399
Best Sleeping Position(s)
Side 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 suits you if natural materials matter. There's no memory foam here: comfort comes from wool, hemp, flax and cotton over a deep bed of springs, which means it sleeps cooler than foam-heavy designs and has a springier, more traditional feel. The soft to medium feel favours side sleepers and lighter builds who need pressure relief at the shoulders and hips. It's National Bed Federation approved and conforms to BS7177: 2008 for home use, so the safety and provenance boxes are covered. Yes, it's a serious spend, but you're paying for a handcrafted British mattress with a genuinely high spring count rather than marketing gloss. Available in five UK sizes, from Single to Super King.
Key features & layer details
Damask cover
A damask cover that's soft to the touch. It's the traditional choice for a handcrafted mattress and feels pleasingly plush under a sheet.
Wool comfort layer
Layers of British wool blended with hemp and flax fibres sit directly beneath the cover. Wool regulates temperature naturally, which means it helps you stay warm in winter and cooler in summer.
Cotton, hemp and flax blend
A cotton, hemp and flax blend is layered throughout the mattress. These natural fibres add breathability and a slightly springy, resilient comfort that foam can't quite match.
Cortec Quad springs
700 Cortec Quad springs, with groups of four springs placed within a single fabric pocket. More springs per pocket means finer, more localised support as you change position.
Posturfil springs
1800 mini Posturfil springs designed with flexibility in mind, adapting with your body as you move through the night. In practice that means less resistance when you roll over.
Mini springs
10000 bouncy mini springs create pockets of airflow throughout the mattress. That built-in ventilation helps keep the natural fillings fresh over time and adds a little extra cushioning.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Side sleepers
The soft to medium feel and wool comfort layer cushion the shoulders and hips, which means better pressure relief when you lie on your side.
Lighter sleepers
Lighter builds get the most from the gentle, cushioned surface, as the soft to medium feel lets them sink in slightly without pushing through to the springs.
Warm sleepers
Wool, hemp, flax and cotton fillings with no memory foam, plus 10000 mini springs creating airflow, mean it sleeps cooler than foam-heavy designs.
Eco-conscious buyers
Comfort comes from British wool, hemp, flax and cotton rather than foam, so natural materials are at the heart of how this mattress is built.
Combination sleepers
The 1800 Posturfil springs are designed to flex with your body, which means less resistance when you roll over during the night.
This isn't the mattress for you if you like a firm, unyielding surface, or if you sleep on your front and need to keep your hips from sinking. If you prefer memory foam, you may miss that slow, hugging sensation, as this has a more traditional sprung feel. Budget shoppers should look elsewhere, given the starting price.
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 Ruby 12500 Pocket Mattress (Soft to Medium Feel)
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FAQ's
Is the Harrison Spinks Ruby 12500 soft or firm?
Harrison Spinks describes it as a soft to medium feel. That gentler tension suits side sleepers and lighter builds who need cushioning at the shoulders and hips, although heavier sleepers or those who prefer a firmer surface may find it a little too forgiving.
How many springs does the Ruby 12500 have?
It has 12,500 springs in total, built up in layers: 700 Cortec Quad springs, 1800 mini Posturfil springs and 10000 bouncy mini springs. The layered design means support adjusts to your body while airflow moves through the mattress.
Does the Harrison Spinks Ruby 12500 come with a trial?
MattressOnline lists a 100-night trial and free delivery to your front door within 7 weeks, but these are that retailer's own offers rather than a Harrison Spinks guarantee. If you buy elsewhere, check the seller's trial and delivery terms before ordering.
What is the Harrison Spinks Ruby 12500 made of?
It's handcrafted in the UK from natural materials: British wool, hemp, flax and cotton over pocket springs. There's no memory foam, which means it feels breathable and responsive rather than warm and hugging. The mattress is 29cm deep.
How long is the guarantee on the Ruby 12500?
The MattressOnline listing states a 5-year guarantee with an additional 5-year warranty thereafter, and other retailer listings show a 5-year guarantee. As these appear on a retailer page, confirm the exact cover with your seller at the point of purchase.
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