Firmness
Type
Open Coil Spring
Depth (cm)
21
Number of Layers
5
Trial Period (nights)
60
Warranty (years)
5
Price Range
£239 to £459
Best Sleeping Position(s)
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
This is a sensible pick if you want a firm mattress from a familiar name without spending a fortune. The spring unit is designed for even weight distribution, which means less rolling together if you share the bed, and the memory layer softens the surface just enough to take the edge off pressure points at your hips and shoulders. The 60-night trial gives you a proper chance to adjust at home, and the 5-year guarantee adds a safety net. At 21cm it's a fairly shallow build, but for a firm sleeper on a budget, or a guest room that needs to earn its keep, it makes a strong case at £239 to £459.
Key Features & what's inside
Cover
Luxury soft micro quilt cover
Top Layer
Miracoil zoned spring system
Who's it NOT for?
If you sleep on your side and are lightweight, a firm mattress like this may not let your shoulder and hip sink in enough, so you could wake with pressure points. It's also a slimmer 21cm build, so if you want a deep, plush, sink-in feel, look elsewhere.
Silentnight Comfort Miracoil Essentials Mattress
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Is the Silentnight Comfort Miracoil Essentials mattress firm or soft?
Silentnight rates it as firm. The memory comfort layer adds a little surface softness and pressure relief, but the overall feel is supportive rather than plush, which tends to suit back and front sleepers, and heavier side sleepers, best.
Does the Silentnight Comfort Miracoil Essentials come with a trial and guarantee?
Yes. Silentnight lists a 60-night trial and a 5-year guarantee on its own site, so you have time to adjust at home and a safety net afterwards.
How deep is the Silentnight Comfort Miracoil Essentials mattress?
It's 21cm deep, which is on the slimmer side. Standard fitted sheets will fit easily, but if you prefer a tall, substantial mattress this may feel a little low-profile.
What sizes does the Silentnight Comfort Miracoil Essentials come in?
Five UK sizes: Single, Small Double, Double, King and Super King. Prices run from £239 to £459 depending on size.
Is the Silentnight Comfort Miracoil Essentials good for allergies?
It's listed as hypoallergenic and dust mite free, which makes it a reasonable choice if you're prone to allergies. The cover fabrics are polyester and polypropylene blends rather than natural fibres.
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