Firmness
Firm
Type
Hybrid
Depth (cm)
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£238 to £468
Best Sleeping Position(s)
Certifications
Assessed from the product page published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Choose this mattress if you want firm support without paying a premium for it. The Miracoil spring system spreads support across the width of the mattress rather than relying on individual pockets, which means a stable, consistent feel and decent edge-to-edge usability. The memory foam layer takes the hard edge off that firmness, so you feel cushioned rather than perched on top. From £238, it undercuts a lot of hybrid mattresses, and the retailer-listed 5 year guarantee adds some reassurance. If you sleep on your back or front, or you simply prefer a firmer bed, this is a sensible, affordable option from a familiar name.
Key Features & what's inside
Awaiting up to date specifications. Please check back later.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers will likely find it puts too much pressure on the shoulders and hips. If you prefer a plush, sink-in feel, look elsewhere. It's also currently listed in UK Single, Small Double and Super King only, so anyone needing a standard Double or King may be out of luck.
Silentnight Seoul Miracoil Memory Mattress
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Is the Silentnight Seoul Miracoil Memory mattress firm or soft?
It's rated firm. The Miracoil springs give a supportive, stable base, while the memory foam layer adds a slightly softer surface feel. It suits back and front sleepers well, but lighter side sleepers may find it firmer than they'd like.
How much does the Silentnight Seoul Miracoil Memory mattress cost?
Prices range from £238 to £468 depending on the size you choose, starting from £238. That's affordable for a hybrid mattress combining springs and memory foam from a major British brand.
What sizes does the Silentnight Seoul Miracoil Memory come in?
It's currently listed in UK Single, UK Small Double and UK Super King. That's an unusual line-up, as standard Double and King don't appear in the current listing, so check availability if you need one of those sizes.
Does the Silentnight Seoul Miracoil Memory mattress have a guarantee?
Mattress Online, the retailer currently listing this mattress, shows a 5 year guarantee. Guarantee terms can differ between sellers, so confirm the details with the retailer before you buy.
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