Relyon Ortho Superior Extra Firm 1500 Mattress
The Relyon Ortho Superior Extra Firm 1500 is exactly what its name suggests: an extra firm pocket sprung mattress built for people who want a genuinely solid sleeping surface.
- Extra-firm for back & front sleepers
- Supports you where you need it
- Cotton fillings regulate temperature
£629
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The Relyon Ortho Superior Extra Firm 1500 is 32cm deep, filled with cotton and natural fibres, and finished with wool hand-tufting under a Belgian damask viscose cover. It's available in five UK sizes, from single to super king. It comes from an NBF-approved manufacturer and is delivered flat rather than rolled and boxed, which means the springs and fillings arrive exactly as they were made. Be clear-eyed about the firmness, though. Extra firm really does mean extra firm here.
Mattress specifications
Firmness
Extra Firm
Type
Pocket Spring
Depth (cm)
32
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£629 to £1,079
Best Sleeping Position(s)
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
If you sleep on your back or front and find most mattresses too soft, this one is aimed squarely at you. The 1500 pocket springs each sit in their own fabric pocket, which means they respond to your body independently and support you where you actually need it rather than sagging as one unit. Cotton fillings help regulate temperature, so you shouldn't overheat the way you might on a foam-heavy design. The listing at mattressnextday.co.uk states a Relyon 10-year guarantee, which offers reassurance on longevity. It's not a budget buy, but the natural fillings and traditional flat-delivered construction go some way to justifying the price.
Key features & layer details
Belgian Damask Viscose Sleep Surface
A silky, breathable damask cover that lets air move through the sleep surface. In practice, this means a fresher, less clammy feel through the night.
Cotton
A natural filling that helps regulate body temperature, so you're less likely to wake up too warm. It also adds a layer of support and natural comfort above the springs.
1500 Pocket Springs
Each of the 1500 springs sits in its own fabric pocket, working independently of its neighbours. This means the mattress contours to your body and relieves pressure rather than moving as a single unit.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Back sleepers
The extra firm feel and 1500 pocket springs keep your body supported from underneath, so you stay level instead of sinking into a soft surface.
Front sleepers
Extra firm tension means your hips are held up rather than dipping down, which suits anyone who finds most mattresses too soft lying on their front.
Warm sleepers
Cotton filling helps regulate body temperature, and the breathable Belgian damask cover lets air move through, so you should feel fresher and less clammy overnight.
Eco-conscious buyers
Cotton and natural fibres fill the 32cm depth, with wool hand-tufting holding everything together, giving a traditional build that leans on natural materials.
Side sleepers, particularly lighter ones, will likely find this too firm at the shoulder and hip, which can create pressure points rather than relieve them. If you prefer a plush, sink-in feel, look elsewhere entirely. And because it's delivered flat rather than rolled, tight staircases or awkward hallways could make getting it into the bedroom a challenge.
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 Ortho Superior Extra Firm 1500 Mattress
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Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How firm is the Relyon Ortho Superior Extra Firm 1500?
It's rated extra firm, and reviews suggest it lives up to that. Some owners found it firmer than they expected. That suits back and front sleepers who want strong spinal support, but lighter side sleepers may find it a little unforgiving.
How many springs does the Relyon Ortho Superior 1500 have?
It has 1500 pocket springs, each housed in its own fabric pocket. Because they move independently, the mattress responds to your body shape rather than pushing back as one solid surface, which improves pressure relief despite the extra firm feel.
Does the Relyon Ortho Superior Extra Firm come with a guarantee?
The mattressnextday.co.uk listing states a Relyon 10-year guarantee. No trial period is mentioned on that page, so if you want the option to return it after sleeping on it, check the terms with your chosen retailer before you buy.
Is the Relyon Ortho Superior 1500 delivered rolled up in a box?
No. It arrives flat, which preserves the pocket springs and natural fillings as they were made. Mattressnextday.co.uk offers free next day delivery to mainland UK on it, though some addresses may incur a small fee. Do check access to your bedroom, as flat mattresses are bulkier to move.
What sizes does the Relyon Ortho Superior Extra Firm 1500 come in?
Five UK sizes: single, small double, double, king and super king.
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