Relyon Heyford Ortho 1500 Pocket Mattress
The Relyon Heyford Ortho 1500 Pocket Mattress is an extra firm pocket spring mattress, handcrafted in the UK, with 1500 individual springs and a 32cm depth.
- Extra-firm support for heavier builds
- Foam-free fibres keep you cooler
- Minimises partner disturbance
£784
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The Relyon Heyford Ortho 1500's extra firm feel means exactly that: a solid, supportive surface rather than a cushioned one, which suits people who want an orthopaedic feel or who sleep on their back or front. It comes in five UK sizes from Single to Super King. It's a traditional build of cotton, polyester and springs rather than foam, so it sleeps cooler than memory foam alternatives. If you like sinking into a mattress, this isn't the one for you.
Mattress specifications
Firmness
Extra Firm
Type
Pocket Spring
Depth (cm)
32
Number of Layers
7
Trial Period (nights)
100
Warranty (years)
10
Price Range
£648 to £1,004
Best Sleeping Position(s)
Stomach 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?
Choose the Heyford Ortho 1500 if firm support is your priority. The 1500 pocket springs move independently, which means the mattress responds to each sleeper separately and limits the ripple effect when a partner moves. Above the springs sit layers of cotton and polyester fibres rather than foam, so air moves through more freely, a genuine help if you're a hot sleeper. Relyon is a National Bed Federation approved brand and the mattress is handcrafted in the UK, with a 10 year guarantee listed by the retailer. The feel is uncompromising, but for heavier builds or anyone advised to sleep firmer, that's the point. Owner ratings sit at 4.8 from 46 reviews on mattressonline.co.uk.
Key features & layer details
Damask cover
A finely woven damask fabric, which means a soft-touch surface that doesn't trap heat. It's a durable weave built for long-term use.
Soft white fibres
Two layers of soft white fibres sit just beneath the cover to improve breathability. In practice, this helps the mattress feel fresher through the night.
Cotton and polyester blend
A breathable blend of natural cotton and polyester that wicks moisture away from you. This keeps air circulating rather than building up warmth.
Rebound polyester and cotton fibres
A further layer of rebound polyester and cotton fibres adds a touch of comfort. It softens the surface slightly without compromising the firm feel.
Dense polyester layer
A dense polyester layer that reinforces the firm, orthopaedic character of the mattress. This is where much of the extra firm feel comes from.
Spring insulation pad
An insulation pad sits between the comfort layers and the springs. It protects the spring unit and adds durability over the years.
Pocket springs
1500 pocket springs, each secured in its own fabric pocket so they move independently. That means support tailored to your shape and less disturbance from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The dense polyester layer and extra firm feel give a solid, supportive surface, which means your body stays level rather than sinking into the mattress.
Front sleepers
A firm, non-cushioned surface from the dense polyester layer helps stop your midsection sinking in, so lying face down feels flat and supported.
Couples
The 1500 pocket springs each sit in their own fabric pocket, which means less disturbance when your partner moves during the night.
Warm sleepers
Cotton and polyester fibres sit above the springs instead of foam, so air moves through more freely and the bed sleeps cooler.
Heavier sleepers
The extra firm build, with its dense polyester layer and 1500 independent springs, gives a solid feel that suits heavier builds well.
This isn't a mattress for lightweight side sleepers or anyone who likes a plush, cushioned feel. Extra firm surfaces can press on shoulders and hips if you sleep on your side, and there's no memory foam hug here. If you want softness with your support, look at a medium firm option instead.
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.
Relyon Heyford Ortho 1500 Pocket Mattress
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FAQ's
How firm is the Relyon Heyford Ortho 1500?
It's rated extra firm, the top end of the firmness scale. Expect a solid, orthopaedic feel with minimal sink. That suits back and front sleepers and heavier builds, but lightweight side sleepers may find it a little too unyielding.
Does the Relyon Heyford Ortho 1500 come with a trial period?
Mattress Online lists a 100-night trial with this mattress, but it's the retailer's own offer rather than Relyon's, and it requires buying a mattress protector from MattressOnline. If you buy elsewhere, check that retailer's terms, as they may differ.
What guarantee does the Relyon Heyford Ortho 1500 have?
The retailer listing states a 10 year guarantee. As with any guarantee, keep your proof of purchase and check the terms with the retailer you buy from.
How deep is the Relyon Heyford Ortho 1500 mattress?
It's 32cm deep, which is on the deeper side, so check your fitted sheets will stretch to accommodate it. Extra-deep sheets are usually the safer choice at this depth.
Is the Relyon Heyford Ortho 1500 good for hot sleepers?
It should sleep reasonably cool. The comfort layers are cotton and polyester fibres rather than foam, and the damask cover doesn't retain heat, so air circulates more freely than it would through a memory foam mattress.
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