Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£988 to £2,154
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.
The main draw here is the natural fill. Yorkshire wool and mohair on top, with cotton, flax and hemp beneath, which means the mattress breathes and wicks moisture rather than trapping heat the way synthetic foams can. If you're a hot sleeper, that matters. Underneath sit over 9,000 individual pocket springs, each moving independently, so you get support tailored to your shape and less disturbance from a partner shifting about. It's hypoallergenic and naturally antibacterial too, a genuine plus for allergy sufferers. One caveat: the retailer notes the spring count may differ slightly from the 9750 in the name. At 29cm deep, check your fitted sheets will stretch to it.
Key Features & what's inside
- Comfort Layer. 100% Yorkshire wool blended with silky-smooth mohair, chosen for its springy, soft and resilient qualities. In practice that means a comfortable surface that recovers its shape rather than developing dips quickly.
- Additional Comfort Fillings. Fine cotton, flax and hemp fibres that are naturally breathable and wick away moisture. You should feel noticeably cooler through the night than on a foam-heavy mattress.
- Support System. Over 9,000 individual pocket springs encased in breathable fabric, each reacting independently. This gives tailor-made support and pressure relief, with less motion transfer if you share the bed.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This isn't the mattress for tight budgets, with prices starting at £988. Fans of a memory foam hug will find the springy natural feel quite different, and some owners reported it felt firmer than expected, so lightweight side sleepers may want to use the trial period carefully before committing.
Harrison Spinks Alwoodley 9750 Pocket Mattress
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How firm is the Harrison Spinks Alwoodley 9750 mattress?
The Mattress Online listing describes it as Medium, a middle-of-the-road feel that suits most back and combination sleepers. Some owner reviews mention it feeling firmer than expected, so if you're a lightweight side sleeper it may be slightly firmer than you'd like.
Does the Harrison Spinks Alwoodley 9750 come with a trial period?
Mattress Online lists a 100-night trial with this mattress. That's the retailer's own offer rather than a Harrison Spinks guarantee, so if you buy elsewhere in future, check that seller's terms before ordering.
What is the Harrison Spinks Alwoodley 9750 made of?
Entirely natural fillings: 100% Yorkshire wool blended with mohair, plus cotton, flax and hemp fibres, over a base of more than 9,000 pocket springs. It's handcrafted in the UK, hypoallergenic, naturally antibacterial and approved by the National Bed Federation.
What sizes does the Harrison Spinks Alwoodley 9750 come in?
Five sizes: UK Single, UK Double, UK King, UK Super King and UK Emperor. Prices range from £988 to £2,154 depending on the size you choose, and the mattress is 29cm deep across the range.
How long is the guarantee on the Harrison Spinks Alwoodley 9750?
The mattressonline.co.uk listing states a 5 year guarantee. As this appears on a retailer's page rather than the brand's own site, it's sensible to confirm the guarantee terms with your chosen seller at the point of purchase.
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