Firmness
Type
Open Coil Spring
Depth (cm)
24
Number of Layers
3
Trial Period (nights)
Warranty (years)
5
Price Range
£167 to £311
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.
You would choose this mattress for dependable, firmer-leaning support at a genuinely modest price. The Miracoil springs are zoned into individual sleeping areas, which means your hips and shoulders get support where they need it and you are less likely to feel a partner moving. Air Plus fibres in the comfort layer encourage airflow, so it should sleep a little cooler than a foam-heavy alternative. It carries a 5-year manufacturer's guarantee from Silentnight, is hypoallergenic, made in the UK by an NBF-approved manufacturer, and meets the BS7177: 2008 fire safety standard. Yes, it is a simple build, but that simplicity is part of why it costs so little.
Key Features & what's inside
- Cover. A soft knitted cover that is highly breathable, which means less heat trapped at the surface. It feels soft to the touch rather than stiff or papery.
- Comfort Fillings. Air Plus fibres, breathable comfort fibres that encourage airflow through the mattress. In practice that helps keep the sleep surface feeling fresher through the night.
- Support System. Silentnight's Miracoil spring system, a zoned open coil unit designed to support all parts of the body with individual sleeping zones. The no roll-together design means you are less likely to drift into your partner's side.
- Base Note. The mattress is double sided, so you can flip it to even out wear over time. It arrives flat rather than rolled and boxed, which spares the springs any compression.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
If you sleep on your side and are lightweight, the medium-firm feel may press a little too much at the shoulder and hip. It is also slimmer than many hybrids at 24cm, so anyone wanting a deep, plush, hotel-style surface should look elsewhere. There is no trial period mentioned on the listing, either.
Silentnight Double Sided Miracoil Mattress
Across 655 reviews on MattressNextDay's product page, rated 4.8 out of 5, customers praise the firm support and durability of the Miracoil spring system, with many highlighting its suitability for front and back sleepers and its value for money.
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Is the Silentnight Double Sided Miracoil mattress firm or medium-firm?
Silentnight describes it as having a medium-firm feel, although the specifications table on the MattressNextDay listing labels it as firm. In practice, expect it to sit on the firmer side of medium, which suits back and front sleepers well.
Can you flip the Silentnight Double Sided Miracoil mattress?
Yes. It is a double sided mattress, so you can flip it to spread wear across both surfaces, and it arrives flat rather than rolled and boxed.
What sizes does the Silentnight Double Sided Miracoil come in?
It is available in UK Single, Small Double, Double, King and Super King sizes, priced from £167 to £311 depending on the size you choose.
Does the Silentnight Double Sided Miracoil have a guarantee?
Yes, it comes with a 5-year manufacturer's guarantee from Silentnight. No trial period is mentioned on the MattressNextDay listing, so check the returns policy of whichever retailer you buy from.
How is the Silentnight Double Sided Miracoil delivered?
MattressNextDay lists free next day delivery to mainland UK, although some addresses may incur a small fee. The mattress is delivered flat, not rolled and boxed. These are the retailer's own services, so terms may differ if you buy elsewhere.
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