Silentnight Memory Cool 3000 Pckt Box Top Double 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
£667
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Silentnight Memory Cool 3000 Pckt Box Top Mattress
More available sizes
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
- Room to share, room to breathe: At 135cm wide you get 67.5cm each for two people sharing, which most couples find comfortable if neither of you sprawls.
- Fits the average UK bedroom: We suggest allowing at least 2.6m x 2.8m, which leaves space for bedside tables on both sides in most rooms.
- Less partner disturbance at this width: The 2000 Mirapocket springs respond individually, so at a shared 135cm width you'll feel less of your partner turning over.
- Cooling matters more when you share: Two bodies raise the temperature under one duvet, and the graphite-infused Memory Cool foam is designed to draw that heat away.
- Easy to dress: Standard double sheets and a 200 x 200cm double duvet fit, both stocked everywhere, though the 37cm depth means you'll need deep fitted sheets.
This size suits you if...
You're a couple in a typical UK bedroom where a bigger bed would crowd the walls, or you sleep alone and want space to stretch out, perhaps with a dog or cat claiming a corner. It also suits a guest room that regularly hosts visiting couples, since the medium soft box top feels welcoming from the first night rather than needing weeks to soften.
Consider another size if...
You share every night and one of you is tall or a restless sleeper, since 67.5cm each can feel snug. We'd recommend the UK king instead: it's 15cm wider and 10cm longer, and we suggest at least 2.7m x 2.9m of room for it.
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FAQ's
Is the Memory Cool 3000 in a UK double big enough for two people?
For most couples, yes. The 135cm width gives 67.5cm each for two people sharing, and the individually pocketed springs mean you'll feel less movement from your partner. If either of you is broad-shouldered or spreads out in the night, the UK king's extra 15cm of width is worth considering.
What room size do I need for the Memory Cool 3000 double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That gives you walking space on both sides and, in most rooms, enough left over for bedside tables. Our own guidance, this, rather than Silentnight's, so measure your room before ordering.
What bedding fits the Memory Cool 3000 double, given how deep it is?
Standard UK double sheets and a 200 x 200cm double duvet are the right size, and both are stocked everywhere at every price. One caveat: this mattress is 37cm deep across every size, so check your fitted sheets are extra deep before it arrives, as standard-depth ones will slip off.
Will the Memory Cool 3000 double get up a narrow staircase?
At 135 x 190cm and 37cm deep, it's a bulky item, and hybrids with springs don't fold the way rolled foam mattresses do. If you live in an older terrace with a turning staircase, or a new build with a tight landing, measure the awkward point first. Delivery is to your room of choice.
Where's the best place to buy the Memory Cool 3000 in a double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so the cheapest stockist for the UK double one week isn't always the cheapest the next. It's the same mattress wherever you buy it, so price is the sensible deciding factor.