Firmness
Type
Hybrid
Depth (cm)
26
Number of Layers
3
Trial Period (nights)
Warranty (years)
1
Price Range
£169 to £329
Best Sleeping Position(s)
Certifications
Assessed from Spring King's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress makes sense if you want firm, orthopaedic-style support on a modest budget. The open coil springs are made from high-tensile steel joined in a lattice, which means the whole surface works together to hold your body level, while the memory foam layer above moulds to your shape and eases pressure points at the hips and shoulders. The knitted cover is breathable, so it should help keep your temperature steadier through the night, a sensible touch given memory foam's reputation for warmth. Free next day delivery is a genuine plus if your old mattress has already given up. The 1-year guarantee is short, but at a from-price of £169 the value case still holds.
Key Features & what's inside
- Cover. A soft knitted cover that is breathable, which means heat can escape rather than build up under you. It helps keep you at a more even temperature through the night.
- Memory Foam. This layer moulds to your body, which means pressure points such as hips and shoulders get some relief while you still feel supported. It is where the orthopaedic comfort of the mattress comes from.
- Open Coil Springs. Interlaced coils of high-tensile steel joined together in a lattice. Because the coils are connected, the surface responds as one unit, giving broad, even body support with a traditionally firm feel.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it a little too unyielding at the shoulder and hip. Open coil springs also move as one connected unit, which means couples may notice more motion transfer than with pocket springs. And if you prefer a deep, cradling sink-in feel, look elsewhere.
Spring King Memory Ortho Mattress
Across owner reviews on mattressnextday.co.uk, where it holds a 4.8 rating from 88 reviews, customers frequently praise the comfort and quality of materials. The firm support draws particular mention from those who value it for spinal alignment.
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Is the Spring King Memory Ortho mattress firm or soft?
It is rated firm. The open coil springs give solid, even support across the whole surface, while the memory foam layer softens the feel slightly at pressure points. It suits people who like a supportive orthopaedic feel, although lightweight side sleepers may find it a little too firm.
How deep is the Spring King Memory Ortho mattress?
It is 26cm deep, made up of open coil springs, a layer of memory foam and a breathable knitted cover. Standard UK fitted sheets should fit without difficulty.
What sizes does the Spring King Memory Ortho come in?
Five UK sizes: Single, Small Double, Double, King and Super King. Prices range from £169 to £329 depending on the size you choose.
Does the Spring King Memory Ortho mattress come with a guarantee?
Yes, it comes with a 1-year guarantee. That is shorter than many brands offer, so it is a fair point to weigh against the low price. Free next day delivery is included.
Does the Spring King Memory Ortho sleep hot?
Memory foam can hold warmth, but this mattress uses a breathable knitted cover designed to keep you at a more even temperature through the night. If you are an especially hot sleeper, a mattress with less foam may still suit you better.
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