Silentnight Memory Cool 3000 Pocket Box Top Mattress
Mattress
Silentnight Memory Cool 3000 Pocket Box Top Mattress
Size
Firmness
Construction
Depth (cm)
37
Layers
4
Layer Details
- Memory Cool™ foam. Graphite infused Memory Cool foam moulds to your body, relieving pressure and absorbing energy. It actively transfers heat away from you, which Silentnight says makes it 15% cooler than standard memory foam.
- Mirapocket® springs. 2000 Mirapocket springs sit in individual pockets and respond independently to every movement. In practice that means less disturbance from a partner and support tailored to where your body needs it.
- Mini springs. A layer of 1000 mini springs adds zoned support. These smaller springs fine-tune how the mattress responds under different parts of your body.
- Box top. A sumptuous box top forms the sleep surface. This gives you a plush, cushioned feel from the moment you lie down.
Layer details from silentnight.co.uk product page, September 2026.
- Space to actually spread out: At 120cm across, a solo sleeper gets 30cm more width than a UK single, which means you can shift position freely on the soft, cradling surface.
- Fits rooms a double overwhelms: It's 15cm narrower than a UK double, which can be the difference between a door that clears the bed and one that doesn't in a box room or loft conversion.
- Cooling where it matters for one: The graphite infused Memory Cool foam moves heat away from a single sleeper lying centrally, right where warmth tends to build.
- A sensible guest room choice: Occasional visiting couples can share it comfortably for a night or two, while the 2000 Mirapocket springs keep one person's movement from waking the other.
- Standard 4ft size for bedding: The small double is a standard UK size, so frames and fitted sheets are easy to find, though check they stretch to this mattress's 37cm depth.
This size suits you if...
You sleep alone and have outgrown a UK single but your room can't spare the width of a UK double, or you're furnishing a guest room, rental or second bedroom where couples stay occasionally rather than nightly. It also fits a teenager who needs a proper adult bed without giving up the remaining floor space.
Consider another size if...
You share the bed every night; on 120cm of medium soft box top, two adults will tend to roll towards each other. We'd recommend the UK double instead, allowing at least 2.6m x 2.8m of room space.
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Can a couple sleep on the Memory Cool 3000 in a small double?
For the odd night, yes. The 2000 Mirapocket springs respond independently, so one person turning over disturbs the other less than you might expect. For every night, 120cm is tight for two adults, and the medium soft feel means you'll drift towards the middle. Nightly sharers would be happier on the UK double, which is 15cm wider.
What room size do I need for a small double Memory Cool 3000?
We suggest allowing at least 2.4m x 2.8m. That leaves enough space to walk around the bed and open drawers without squeezing past. If your room comfortably exceeds that, it may fit the UK double, for which we suggest at least 2.6m x 2.8m.
What bedding fits the small double Memory Cool 3000?
You'll need small double (4ft) fitted sheets, and this mattress is 37cm deep, so standard depth sheets may not stretch far enough. Look for extra deep fitted sheets before it arrives. A standard double duvet works well on a small double, giving each side a little generous overhang.
Is a small double the same length as a double?
Yes. Both the UK small double and the UK double are 190cm long, so the small double gives up nothing in legroom. The only difference is width: the UK small double is 15cm narrower. Taller sleepers who want extra length would need to look at the UK king, which is 10cm longer.
Where can I compare prices for this size?
The prices shown on this page are pulled from retailers stocking the Silentnight Memory Cool 3000 in a UK small double and updated as retailers change them, so the table here is the quickest way to check what you'd pay today. Prices vary by size, so quotes you've seen for a UK double won't match.