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)
Certifications
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
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. At £629 for a single, it's not a budget buy, but the natural fillings and traditional flat-delivered construction go some way to justifying the price.
Key Features & what's inside
- 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.
Who's it NOT for?
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.
Relyon Ortho Superior Extra Firm 1500 Mattress
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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. Prices range from £629 to £1,079 depending on the size you choose, with the single starting at £629.
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