Silentnight Memory Cool 1000 Mattress
Mattress
Silentnight Memory Cool 1000 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 while actively moving heat away from you. Silentnight says this creates a sleep environment 15% cooler than standard memory foam, which means less of the clammy feeling memory foam is known for.
- Mirapocket® springs. 1000 pocket springs, each held in its own fabric pocket so it responds to your movement independently. In practice that means zoned support along your body and less motion transfer across the bed.
Layer details from silentnight.co.uk product page, September 2026.
- Fits most UK bedrooms: At 4ft 6in x 6ft 3in, the UK double sits comfortably in rooms where the UK king would crowd the space.
- Room for bedside tables both sides: In a typical double bedroom, this footprint usually still leaves space for a table on each side, which matters when you both want a lamp and a phone charger.
- Less partner disturbance where it counts: With 67.5cm each for two people sharing, the 1000 individually pocketed springs help mask a restless partner's movement in a size where you sleep fairly close.
- Easier delivery access: A UK double is generally simpler to get up turning stairs in older terraces or tight new build landings than the wider sizes.
- Cheapest way to share this cooling build: You get the same graphite-infused Memory Cool foam and Mirapocket springs as the larger sizes, in the most affordable footprint made for two.
This size suits you if...
You're a couple in a typical UK bedroom and want the standard shared size, you're a solo sleeper who likes space to spread out, perhaps with a dog or cat claiming a corner, or you're setting up a guest room that visiting couples will actually use. Allow at least 2.6m x 2.8m of floor space, with around 3m x 3m the comfortable norm.
Consider another size if...
You and your partner both sleep on this Medium/Firm surface every night and 67.5cm each feels tight. 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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Is the Silentnight Memory Cool 1000 double big enough for two adults?
It gives 67.5cm each for two people sharing, which is the long standing UK standard for couples. Average-sized couples who sleep fairly close will be fine, and the 1000 pocket springs limit how much you feel each other move. If either of you is broad or a sprawler, the UK king's extra 15cm of width is a meaningful upgrade.
What room size do I need for the Memory Cool 1000 in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That leaves walking room on both sides and, in most layouts, space for bedside tables both sides. If your room is smaller, the UK small double is 15cm narrower and the same length, and we suggest at least 2.4m x 2.8m for it.
Should I get the Memory Cool 1000 in a double or a king?
The UK double is 15cm narrower and 10cm shorter than the UK king, so it suits typical UK bedrooms where a king would dominate. Couples who value sleeping space over floor space, or anyone over about 6ft, should consider the UK king, allowing at least 2.7m x 2.9m of room for it.
Is the double Memory Cool 1000 good for a guest room?
Yes, it's arguably the ideal guest size because it accommodates visiting couples as well as solo guests, and the Medium/Firm feel suits a wide range of sleepers for short stays. The 135 x 190cm footprint fits most second bedrooms alongside a wardrobe and drawers without crowding the door.
Will the double fit up narrow stairs?
It's roll-packed sizes aside, generally the double is the easier of the shared sizes to manoeuvre: at 4ft 6in wide it copes better with turning stairs in older terraces and tight new build landings than a UK king would. Measure your tightest turn before ordering, and check the retailer's delivery details via the prices shown on this page.