Firmness
Medium Soft
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
5
Price Range
£1,049 to £1,949
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.
Layered natural fillings are the draw here. Wool insulates and breathes, and a blend of cotton, hemp and flax fibres wicks moisture away, which means the mattress should feel less clammy than synthetic-topped alternatives if you tend to run warm at night. The sheer spring count, 9,700 across three types, gives a gradual, contouring feel rather than an abrupt push-back. It carries National Bed Federation approval and conforms to BS7177: 2008 fire safety standards. Yes, the price is high, but the construction and UK handcrafting go some way to justifying it. MattressOnline lists a 100-night trial and free front door delivery within 7 weeks, though those are that retailer's own terms, not the brand's.
Key Features & what's inside
- Comfort fillings. British wool comfort layers sit at the top, which means natural insulation in winter and breathability in summer. Wool also handles moisture well, so the sleep surface should stay fresher for longer.
- Mini Pocket Springs. 1,300 Posturfil mini springs flex as you move, while 8,000 mini pocket springs mould around your body shape. In practice this feels like close, even contouring rather than a single firm push.
- Moisture wicking layer. A blend of soft cotton, hemp and flax fibres forms a breathable barrier against moisture build-up. If you're a hot or sweaty sleeper, this layer does quiet but useful work.
- Support system. 700 Cortec Quad springs form the base, grouped into fours and encased within a fabric pocket. This gives adaptable, responsive support across your whole body rather than just under the heaviest points.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This is the soft to medium version, so it may not suit heavier sleepers or dedicated back and front sleepers who need a firmer surface; the same mattress comes in medium and firm options instead. It's also a significant spend, starting at £1,049, so budget-focused buyers should look elsewhere.
Harrison Spinks Jade 10000 Pocket Mattress (Soft to Medium Feel)
How many springs are in the Harrison Spinks Jade 10000?
9,700 in total: 700 Cortec Quad support springs, 1,300 Posturfil mini springs and 8,000 mini pocket springs. The mini springs sit in the comfort layers to contour to your shape, while the Quad springs underneath provide full body support.
Is the Harrison Spinks Jade 10000 soft or firm?
This version has a soft to medium feel. The mattress is also available in medium and firm options, so lightweight sleepers and side sleepers who like a gentler surface are the natural fit for this particular listing.
What is the Harrison Spinks Jade 10000 made of?
Natural materials feature heavily: British wool comfort layers, a moisture-wicking blend of cotton, hemp and flax fibres, plus pocket springs and mini pocket springs. It's handcrafted in the UK and conforms to BS7177: 2008 fire safety standards.
Does the Harrison Spinks Jade 10000 come with a trial or guarantee?
MattressOnline lists a 100-night trial, though that's the retailer's own offer rather than a brand-wide term, so check terms wherever you buy. The listing states a 5 year guarantee with an additional 5 year warranty thereafter.
How deep is the Harrison Spinks Jade 10000 mattress?
It's 29cm deep, a fairly generous depth thanks to the layered fillings and triple spring system, so you may need deeper fitted sheets. It comes in UK Single, Small Double, Double, King and Super King sizes.
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