Silentnight Memory Cool 1000 Pocket Mattress
Mattress
Silentnight Memory Cool 1000 Pocket Mattress
Size
Firmness
Construction
Depth (cm)
29
Layers
2
Layer Details
- Memory Cool™. A graphite-infused memory foam that moulds to your body to relieve pressure, which means less pushback at your hips and shoulders. The graphite actively transfers heat away from you, and Silentnight claims it creates a sleep environment 15% cooler than standard memory foam.
- Mirapocket® springs. 1000 Mirapocket® springs, each held in its own individual pocket so they respond to every movement independently. In practice that means zoned support where you need it and less of the whole-bed wobble you get with open-coil mattresses.
Layer details from silentnight.co.uk product page, September 2026.
- Room to spread out alone: At 120cm across, the UK small double is 30cm wider than the UK single, which means a solo sleeper can starfish without an elbow off the edge.
- Fits rooms a double overwhelms: It is 15cm narrower than the UK double, often the difference between a box room door that clears the bed frame and one that doesn't.
- Cooler foam for smaller rooms: Compact bedrooms can run warm, so the graphite-infused Memory Cool layer, claimed by Silentnight to sleep 15% cooler than standard memory foam, is a sensible match.
- Handles the occasional guest: The 1000 Mirapocket springs respond individually, so when two people do share for a night, one person shifting disturbs the other less.
- Easy bedding and frames: The 4ft size is a standard UK width, so small double frames and fitted sheets are simple to find, and a regular double duvet works fine on top.
This size suits you if...
You sleep alone most nights and have outgrown a UK single but can't spare the width a UK double takes, perhaps in a loft conversion or a downsized bedroom where every centimetre beside the bed matters. It also fits a guest room or holiday let where couples stay occasionally rather than nightly, and the Medium/Firm feel suits the mix of visiting sleepers reasonably well.
Consider another size if...
You share the bed every night. At 120cm wide, two adults will feel it, especially on a Medium/Firm surface that doesn't let you sink together. We'd recommend the UK double instead, allowing at least 2.6m x 2.8m of room.
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Is a small double big enough for the Silentnight Memory Cool 1000 to suit a couple?
For occasional nights, yes. The independent pocket springs limit disturbance when one of you turns over, which helps at this width. For every night, 120cm is snug for two adults, and the Medium/Firm feel means you lie on the surface rather than nestling into it. Full-time couples should consider the UK double, which is 15cm wider.
What room size do I need for the Silentnight Memory Cool 1000 in a small double?
We suggest allowing at least 2.4m x 2.8m. That leaves enough room to walk round the bed and open drawers without turning sideways. If your room comfortably beats that, the UK double needs at least 2.6m x 2.8m by our guidance, so it may be within reach.
How much wider is the small double than the single in this mattress?
The UK small double is 30cm wider than the UK single, and the two are the same length at 190cm. That extra width is the whole point of this size: a teenager or adult who has outgrown a single gets genuine spreading room without the jump to a full double footprint.
Will the small double fit in a loft conversion or box room?
Often, yes, and that's where this size makes most sense. At 4ft x 6ft 3in it can leave standing room beside the bed where a UK double would not. Measure your usable floor space against our suggested minimum of 2.4m x 2.8m, and check the door swing clears the frame before you commit.
Where can I buy the Silentnight Memory Cool 1000 in a UK small double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you order rather than assuming an earlier price still stands. Stock of the UK small double can move around more than the UK double, as fewer shops carry every size.