Silentnight Comfort Gel Memory Foam Mattress
Mattress
Silentnight Comfort Gel Memory Foam Mattress
Size
Firmness
Construction
Depth (cm)
15
Layers
3
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.
- The classic shared size: Two people sharing get 67.5cm each, enough for most couples to settle without a knees-and-elbows negotiation every night.
- Fits ordinary UK bedrooms: Allow at least 2.6m x 2.8m and you should still have space for bedside tables on both sides, which a UK king often rules out.
- Edge to edge support across the full 135cm: The Miratex® base resists roll together, which means both sleepers can use their own half rather than drifting toward the middle.
- Slim profile, easy delivery: At 15cm deep and all foam, the UK double is lighter and easier to steer round a turning staircase or a tight landing than a sprung double.
- Bedding is cheap and everywhere: Double sheets and a 200 x 200cm duvet are stocked at every price point, useful if you're furnishing a whole home on a stretched budget.
This size suits you if...
You're a couple in a typical UK bedroom where a bigger bed would crowd the walls, or you're kitting out a first flat or guest room and want a shared size that visiting pairs will recognise. It also suits a solo sleeper who likes room to spread out, even with a dog or cat claiming a corner. A firm feel should suit you, or at least not put you off.
Consider another size if...
Your room comfortably exceeds 2.7m x 2.9m and you'd both like more elbow room. The UK king is 15cm wider and 10cm longer, so we'd recommend that instead, particularly if either of you is tall.
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Is the Silentnight Comfort Gel double big enough for a couple?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, and the Miratex® base offers edge to edge support with no roll together, so you can each use your full half. Broad-shouldered pairs, or anyone used to sleeping apart, may prefer the UK king, which is 15cm wider.
What room size do I need for a double gel memory foam mattress?
We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm. That usually leaves room for a wardrobe, a chest of drawers and bedside tables on both sides, which is why the double remains the default choice in typical UK bedrooms.
Will the double version fit up narrow stairs?
It's better placed than most. This is an all-foam mattress just 15cm deep, so the UK double is lighter and more forgiving on a turning staircase in an older terrace, or a tight new build landing, than a sprung mattress of the same size. Still measure any awkward corners before ordering.
Should I get this mattress in a double or a king?
The UK double suits rooms where space is tight and couples happy with 67.5cm each. The UK king is 15cm wider and 10cm longer, worth having if either of you is tall or a restless sleeper, but it needs a room of at least 2.7m x 2.9m by our guidance.
What bedding fits the double size?
Standard UK double sheets, sized for 135 x 190cm, plus a 200 x 200cm double duvet. Both are stocked everywhere at every price, handy if you're furnishing several rooms at once. One practical point: at 15cm this mattress is shallower than average, so deep fitted sheets will be baggy. Standard-depth sheets fit better.