Firmness
Medium
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.
If you sleep warm, the natural fillings matter here: wool, hemp and flax breathe far better than memory foam, and the mini pocket springs create pockets of airflow to reduce heat build up. The layered spring system, 8,000 mini pocket springs over 1,300 Posturfil springs and 7,000 Cortec Quad springs, moulds closely to your shape, which means pressure relief without the sinking feeling foam can give. It's handcrafted in the UK and comes from a National Bed Federation Approved Brand. Yes, £1,049 to £1,949 is a real spend, but you're getting a genuinely high-spec natural mattress for it. Sizes run from UK Single to UK Super King.
Key Features & what's inside
- Comfort fillings. A blend of wool, cotton, hemp and flax fibre layers sits at the top. The wool cushions around you for a plush feel, and its natural insulating and breathable properties help regulate temperature through the night.
- Mini Pocket Springs. 8,000 mini pocket springs mould around your unique body shape for enhanced comfort. Their small size also creates pockets of airflow, which means less heat build up than a solid comfort layer.
- Posturfil Springs. 1,300 Posturfil springs with a flexible design sit beneath. Their mini size helps them conform more closely to your shape, offering more points of contact and, in practice, more even pressure relief.
- Cortec Quad Springs. The base layer uses 7,000 award-winning Cortec Quad springs, grouped in fours within fabric pockets and made without glue for flexibility. They respond to your weight and movements, giving your back extra support.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a properly firm surface, this variant is unlikely to suit: it's rated soft to medium, so heavier sleepers or dedicated front sleepers may want the firmer option in the range. Budget shoppers should look elsewhere too, as prices start at £1,049.00. And if you need it quickly, delivery can take up to 7 weeks.
Harrison Spinks Jade 10000 Pocket Mattress (Medium Feel)
How many springs does the Harrison Spinks Jade 10000 have?
16,300 in total, across three layers: 8,000 mini pocket springs, 1,300 Posturfil springs and 7,000 glue-free Cortec Quad springs grouped in fours. The layered design means the springs closest to you handle comfort and contouring, while the Cortec Quad base provides support for your back.
Is the Harrison Spinks Jade 10000 medium firm?
This listing is for the Medium Feel variant, but the product page gives it a soft to medium feel firmness rating, so expect a gentler, more cushioned surface than a true medium firm. The mattress is also available in other firmness options if you need something firmer.
Does the Harrison Spinks Jade 10000 come with a trial?
Mattress Online lists a 100-night trial with this mattress, along with a 5 year guarantee. These are the retailer's own terms, so if you buy elsewhere, check that retailer's trial and guarantee before ordering.
What is the Harrison Spinks Jade 10000 made of?
Comfort layers use natural wool, cotton, hemp and flax fibres, sitting over three spring layers: mini pocket springs, Posturfil springs and Cortec Quad springs. The mattress is 29cm deep, handcrafted in the UK and conforms to BS7177: 2008 for home use.
How long does delivery take for the Harrison Spinks Jade 10000?
Mattress Online offers free delivery to the front door of your building within 7 weeks for mainland England and most of Scotland, Wales and Northern Ireland. Delivery to your room of choice costs £20.00, and old mattress recycling is £35.00. 7 weeks is a long wait.
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