Silentnight Comfort Gel Memory Foam Mattress
The Silentnight Comfort Gel Memory Foam Mattress is a firm, all-foam mattress with a quilted cover, a layer of cool gel memory foam and a supportive Miratex® foam base.
- Firm feel with cooler gel foam
- Cradles shoulders & hips
- Edge-to-edge support, no roll-together
£199
Get the lowest price we've found
At 15cm deep, the Silentnight Comfort Gel is slimmer than many mattresses, which means it suits divans, bunk beds and adjustable frames well, though it may feel shallow on a tall bedstead. The gel-infused foam is designed to regulate temperature better than standard memory foam, a sensible touch given how warm foam can sleep. It's made in the UK by an NBF-approved manufacturer and comes with a 5-year Silentnight guarantee. Available in UK Single, Double and King.
Mattress specifications
Firmness
Firm
Type
Gel Memory Foam
Depth (cm)
15
Number of Layers
3
Trial Period (nights)
Warranty (years)
5
Price Range
£199 to £299
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
If you like a firm feel and want memory foam without the usual heat build-up, this is a reasonable place to start. The cool gel layer offers pressure relief while regulating temperature better than standard memory foam, which means you should sink in less clammily than on older foam designs. The Miratex® base conforms to your body and gives edge to edge support, so you can use the full width of the mattress without that roll-toward-the-middle feeling. It sits at the affordable end of the market, and the 5-year Silentnight guarantee adds some reassurance for the price. It's one-sided, so no flipping, though you should rotate it head to toe regularly.
Key features & layer details
Soft Touch Quilted Cover
A quilted fabric finish that gives a smooth, breathable sleep surface. It's the first thing you'll feel, and the quilting adds a little softness over the firm foam beneath.
Cool Gel Memory Foam
This layer provides pressure relief and support, cradling your shoulders and hips as you settle in. The gel infusion regulates body temperature better than standard memory foam, which means less of the overheating foam is known for.
Supportive Miratex® Foam
Miratex® foam conforms to the shape of your body as you sleep. It provides edge to edge support with no roll together, so you get the full sleeping surface rather than drifting toward the middle.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Warm sleepers
The cool gel memory foam layer regulates temperature better than standard memory foam, which means less of the heat build-up foam is known for.
Budget buyers
It sits at the affordable end of the market, and the 5-year Silentnight guarantee adds some reassurance for the money.
Bunk beds
At 15cm deep, it is slimmer than many mattresses, which means it sits comfortably within the limited space of a bunk bed frame.
Adjustable beds
The slim 15cm depth and all-foam build suit adjustable frames well, so the mattress can sit neatly on the base as it moves.
Couples
The Miratex® base gives edge to edge support with no roll together, so both of you can use the full width without drifting toward the middle.
This mattress is described as firm, so lightweight side sleepers may find it a little unforgiving on the shoulders and hips. At 15cm deep it's also slimmer than average, which taller or heavier sleepers may notice. And if you prefer the springy feel of pocket coils, an all-foam design won't give you that.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Silentnight Comfort Gel Memory Foam Mattress
Select a comparison article below or choose to compare this mattress side by side with up to 2 other mattresses.
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How firm is the Silentnight Comfort Gel Memory Foam mattress?
It's rated firm. That suits back and front sleepers who want plenty of support, although lightweight side sleepers may find it slightly too solid for comfortable pressure relief at the shoulder and hip.
Does the Silentnight Comfort Gel mattress need turning?
No, it's a one-sided design so it never needs flipping. The retailer listing does note you should rotate it head to toe regularly, which helps the foam wear evenly over time.
How deep is the Silentnight Comfort Gel Memory Foam mattress?
It's 15cm deep, which is slimmer than many mattresses. That makes it a good fit for bunk beds, sofa beds and adjustable bases, but check your fitted sheets, as deep-pocket sheets may sit loosely.
What guarantee comes with the Silentnight Comfort Gel mattress?
It comes with a Silentnight 5-year guarantee, as stated on the mattressnextday.co.uk listing. Mattressnextday also lists free next day delivery to mainland UK and old mattress removal for an extra charge, though those are that retailer's own offers rather than Silentnight's.
What sizes does the Silentnight Comfort Gel mattress come in?
It's available in UK Single, Double and King. There's no Small Double or Super King listed.
Couldn't find an answer to your question? Send us a message