Silentnight Memory 7 Sleep Mattress
Mattress
Silentnight Memory 7 Sleep Mattress
Size
Firmness
Construction
Depth (cm)
Layers
2
Layer Details
- Memory foam. A 30mm layer of memory foam sits on top and responds to your natural body heat. In practice this means it softens where you're warmest and moulds to your shape, giving that gentle, hugged-in feel memory foam is known for.
- Miratex foam. Beneath the memory foam, Miratex foam provides support right up to the edge of the mattress, so you can use the full sleeping surface. Its movement absorption also eliminates roll together, which means you and a partner stay on your own sides rather than sinking towards the middle.
Layer details from mattressman.co.uk product page, September 2026.
- Roll together eliminated where it counts: With 67.5cm each for two people sharing, the Miratex foam's ability to stop you drifting into the middle keeps that space genuinely yours.
- Edge support opens up the full 135cm: Support runs right to the mattress edge, so neither of you needs to hug the centre to feel held.
- A footprint most UK bedrooms can take: At 4ft 6in x 6ft 3in, this size leaves room for wardrobes and drawers where a larger bed would dominate.
- Movement absorption for shared sleep: The foam layers absorb a restless partner's turning, which is a real advantage when you sleep this close together.
- Bedding is cheap and everywhere: Double sheets and a 200 x 200cm duvet are stocked at every price point, a small saving that adds up if you're furnishing a whole home.
This size suits you if...
You share the bed every night and want the classic couples' size that still leaves floor space for the rest of your furniture, you're kitting out a first flat or a whole house and need a shared size that keeps bedding costs down too, or you host visiting couples in a guest room and want a bed they'll both sleep well on.
Consider another size if...
You and your partner both like to spread out, or one of you is tall, since this size is 190cm long. The Silentnight Memory 7 Sleep in a UK king is 15cm wider and 10cm longer; allow at least 2.7m x 2.9m for it.
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How much space does each person get on the Silentnight Memory 7 Sleep UK double?
Two people sharing get 67.5cm each. That's the traditional UK allowance for couples, and the mattress makes good use of it: support runs to the very edge, so the full 135cm width is usable, and the Miratex foam eliminates roll together, so neither of you drifts into the middle overnight.
What room size do I need for the Silentnight Memory 7 in a UK double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That leaves space to walk around the bed and, in most rooms, fit bedside tables on both sides. If your room is smaller, measure with the wardrobe doors open before you commit.
Should I buy the Silentnight Memory 7 in a UK double or a UK king?
The UK double is 15cm narrower and 10cm shorter than the UK king. Choose the UK double if your room is close to our suggested 2.6m x 2.8m minimum, or you want cheaper bedding. If either of you is tall or a restless sleeper, and you can allow 2.7m x 2.9m, size up.
Is the UK double Silentnight Memory 7 a good choice for a guest room?
Yes, it's arguably the most practical guest size, since it accommodates visiting couples as well as solo guests, and double bedding is easy to buy anywhere. The memory foam feel is distinctive, slow-moving and cradling, so guests who prefer a springy surface may find it a little enveloping.
Would this size suit one person sleeping alone?
Comfortably, yes. A solo sleeper gets the whole 135 x 190cm to spread out on, with room to spare for a dog or cat claiming a corner. If you sleep alone in a smaller room, the Silentnight Memory 7 Sleep in a UK single is 45cm narrower and the same length; allow at least 2.1m x 2.8m.