Firmness
Firm
Type
Pocket Spring
Depth (cm)
23
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£435 to £835
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.
Choose this if a firm feel is the priority. The 800 pocket springs sit in separate fabric pockets, which means each one moves independently, so you're less likely to feel a partner shifting during the night. The fibre layers above reinforce that firm support rather than softening it, and the damask cover doesn't retain heat, a quiet benefit if you sleep warm. Across verified owner reviews on Mattress Online it holds a 4.5 rating from 23 reviewers, with several mentioning relief from back pain. Yes, it lacks the fancy foams of pricier models, but for a straightforward firm pocket spring mattress from an established UK maker, the £435 to £835 price range is honest value.
Key Features & what's inside
- Damask cover. A finely woven, durable fabric that feels soft to the touch and doesn't retain heat. That means a cooler surface than many synthetic covers, and one built to last.
- Dual density white fibres. This layer offers a comforting embrace while reinforcing the firm feel, which means a little softness at the surface without undermining the support beneath.
- Soft white fibres. Densely packed fibres that support the spring unit and increase the firm feel. In practice, this is what keeps the mattress feeling stable and consistent edge to edge.
- Pocket springs. 800 pocket springs, each in its own fabric pocket, so they move independently. You'll feel more responsive, localised support and less disturbance from a partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This isn't the mattress for anyone who likes a soft, cushioned feel: it's genuinely firm. Lightweight side sleepers may find there isn't enough give at the shoulder and hip. It also has no side handles, so rotating it takes two people, and there's no standard UK Double in the size range.
Relyon Orthofirm Deluxe 800 Pocket Mattress
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How firm is the Relyon Orthofirm Deluxe 800 Pocket mattress?
It's rated firm, and the construction backs that up: the fibre layers are designed to reinforce rather than soften the feel. It suits back and stomach sleepers and those who prefer solid support, although lightweight side sleepers may find it a little too firm.
Does the Relyon Orthofirm Deluxe come with a trial and guarantee?
Mattress Online, the retailer listing this mattress, offers a 100-night trial and a 10 year guarantee. These are the retailer's own terms rather than Relyon's, so check what applies if you buy elsewhere.
How deep is the Relyon Orthofirm Deluxe 800 Pocket?
The listing states 22.5cm in the main description, though the dimensions table shows 22cm with a tolerance of plus or minus 2cm. Either way, it's a slimmer profile that works well with standard fitted sheets.
What sizes is the Relyon Orthofirm Deluxe 800 available in?
It comes in UK Single, UK Small Double, UK King and UK Super King, priced from £435 to £835. There's no standard UK Double in the range, which is a shame if that's your bed frame size.
Is the Relyon Orthofirm Deluxe made in the UK?
Yes, it's handcrafted in the UK. Relyon is a National Bed Federation Approved Brand and the mattress conforms to BS7177: 2008 for fire resistance, which means it meets British safety standards.
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