Silentnight Memory Cool 3000 Pckt Box Top Single Mattress
The Memory Cool 3000 is Silentnight's box top hybrid, pairing graphite-infused Memory Cool foam with 2000 Mirapocket springs and a further 1000 mini springs, 3000 in total.
- Graphite foam draws heat away
- Medium-soft feel for side sleepers
- 60-night trial & 5-year guarantee
£454
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Silentnight Memory Cool 3000 Pckt Box Top Mattress
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Mattress details
Mattress
Silentnight Memory Cool 3000 Pckt Box Top Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Memory Foam
Depth (cm)
37
Layers
4
Layer Details
Memory Cool™ foam
Graphite-infused memory foam that moulds to your body, relieving pressure while drawing heat away from you. Silentnight says it creates a sleep environment 15% cooler than standard memory foam.
Mirapocket® springs
2000 Mirapocket springs sit in individual pockets, each responding to your movement independently. That means zoned support and less disturbance when a partner shifts about.
Mini springs
A layer of 1000 mini springs adds a second level of zoned support beneath the comfort layers.
Box top
A sumptuous box top finish for a plush, cushioned surface the moment you lie down.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Fits compact rooms: At 3ft wide it slots under a loft slope or alongside a desk and wardrobe, and we suggest allowing at least 2.1m x 2.8m of floor space.
- Full spring count in the smallest size: The 2000 Mirapocket springs and 1000 mini springs are present in the UK single, so one sleeper gets the same zoned support as a couple would.
- A softer feel for lighter sleepers: The medium soft box top gives smaller and lighter bodies enough give to actually sink into, where a firmer mattress can feel like lying on a board.
- Cooling in a teenager's room: The graphite-infused Memory Cool foam draws heat away from the body, useful in small bedrooms that warm up quickly in summer.
- Guest-ready without compromise: In a spare room that doubles as an office, one UK single leaves working space free while still giving visitors a genuinely plush surface rather than a token bed.
This size suits you if...
You're buying for one sleeper, a child moving up from a cot bed, a teenager, or a solo adult in a compact room. It also makes sense if your spare room has to hold a desk as well as a bed, or if two siblings share and you need two beds plus a walkway between them. The medium soft feel suits lighter sleepers who find firmer mattresses unyielding.
Consider another size if...
You're an adult who sprawls, or you sometimes share the bed. At 90cm wide the UK single leaves little margin, so we'd recommend the UK small double instead: it's 30cm wider, the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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FAQ's
What size is the Silentnight Memory Cool 3000 in a UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK single, so it fits any standard single bed frame and takes standard single sheets, though at 37cm deep you'll want fitted sheets with extra-deep sides.
Will the UK single Memory Cool 3000 fit a bunk or mid sleeper?
The width and length match standard bunk frames, but the depth is the problem. At 37cm, this mattress will sit well above the guard rail on most bunks and cabin beds, which is a safety issue on a top bunk. Measure from the base to the top of the rail before buying; many raised frames specify a much shallower maximum.
How much room do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That gives you room to walk alongside the bed and open drawers or wardrobe doors. In a child's room competing with toy storage and a desk, the 90cm width is precisely why the UK single remains the default choice.
Is the UK single Memory Cool 3000 a good choice for a child or teenager?
The medium soft feel tends to suit lighter bodies, which sink less into foam than adults do, so a teenager gets real cushioning rather than a surface that feels harder than intended. The main checks are practical: it can't be flipped, and the 37cm depth rules out most raised and novelty frames.
How does the UK single compare with the UK small double for one adult?
The UK single is 30cm narrower than the UK small double, and both are the same length. A solo adult who moves around a lot at night will notice that difference. If your room allows at least 2.4m x 2.8m, the UK small double is the more comfortable long-term buy; if not, the UK single still delivers the full 3000-spring build.