Silentnight Memory Cool 3000 Pckt Box Top Mattress
Mattress
Silentnight Memory Cool 3000 Pckt Box Top Mattress
Size
Firmness
Construction
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.
- 90cm of width each: Two sharers get 90cm apiece, which means a restless partner can toss and turn on their own side without crowding yours.
- Distance plus isolation: The 2000 Mirapocket springs respond to movement individually, and at this width there's simply more mattress between you, so disturbance drops twice over.
- Room for late-night visitors: A child or pet arriving at 3am still leaves adults with a workable share, something a UK king struggles to offer.
- Cooler at close quarters: Two bodies under one duvet generate heat, and the graphite-infused Memory Cool foam is designed to draw it away rather than trap it.
- Fills a large master properly: In a period bedroom or big new build master a UK king can look undersized; the 6ft x 6ft 6in footprint sits in proportion.
This size suits you if...
You share the bed every night and one of you sleeps restlessly, so distance matters as much as any comfort layer. Or children and pets treat your bed as their own and you'd rather plan for that than fight it. Your room comfortably clears our suggested 3m x 2.9m minimum, ideally closer to 3.5m x 3.2m so doors and drawers still open freely.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest for a UK super king. We'd recommend the UK king instead: it's 30cm narrower but the same length, and needs a smaller room, at least 2.7m x 2.9m.
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Is the Silentnight Memory Cool 3000 super king good for a restless partner?
It's one of the better cases for this size. The 2000 Mirapocket springs move independently, so a fidgeting sleeper transfers less motion across the bed, and with 90cm of width each there's real distance between you as well. If disturbed sleep is your main complaint, the extra 30cm over a UK king often does more than any comfort layer.
Should I get the Memory Cool 3000 in a UK king or a UK super king?
It comes down to room size and how you sleep. The UK super king is 30cm wider than the UK king and the same length, so it needs a bigger room: we suggest at least 3m x 2.9m, against 2.7m x 2.9m for the UK king. If children, pets or a restless partner share your bed, the wider size is the safer buy.
What sheets fit the Memory Cool 3000 in a super king?
You'll need super king fitted sheets, and specifically deep ones: this mattress is 37cm deep across every size, so standard-depth sheets will ping off the corners. Look for extra deep super king sheets, and pair them with a 260 x 220cm duvet so the covers actually reach both edges of the 180cm width.
Is this super king big enough for a family sharing with children?
It's the most practical mainstream option for it. At 180cm wide, a child slotting in between two adults still leaves everyone a reasonable share, and the medium soft box top means little ones sink in comfortably rather than rolling into the middle. Large dogs who claim the foot of the bed are less of a problem at this width too.
What room size does the super king Memory Cool 3000 need?
We suggest at least 3m x 2.9m as a minimum for the UK super king, with around 3.5m x 3.2m feeling comfortable once you add bedside tables and walking space on both sides. Measure door swing too. In a loft conversion, check the sloping ceiling leaves headroom on the wall the 200cm length would sit against.