Silentnight Just Sleep Dream Mattress
Mattress
Silentnight Just Sleep Dream Mattress
Size
Firmness
Construction
Depth (cm)
27
Layers
4
Layer Details
- Vitalize sleep surface. Silentnight says its Vitalize technology absorbs body heat and reflects lost energy back into the body, with claimed benefits for circulation. In practical terms, this is the soft-knit surface you'll feel first.
- High-density ReVo™ foam. An open-cell foam that lets air circulate, which means less of the heat build-up memory foam is known for. Its high density also gives closer body support beneath the softer surface.
- Pocket springs. 1000 zoned Mirapocket springs sit at the core, each moving independently so your partner's movement is less noticeable. The zoning gives firmer support under heavier areas like the hips for better spinal alignment.
- Foam Encapsulated border. A supportive foam wall runs around the base and sides, which means you can sleep right to the edge without that rolling-off feeling. It also helps the mattress keep its shape over time.
Layer details from silentnight.co.uk product page, September 2026.
- Sharing without partner disturbance: The 1000 zoned Mirapocket springs move independently, which means at 67.5cm each for two people sharing, one person turning over is far less noticeable to the other.
- Firm edges make the width go further: The foam-encapsulated border lets you sleep right up to the side without a rolling-off feeling, useful on a UK double where neither of you has space to spare.
- Fits the rooms most of us actually have: We suggest at least 2.6m x 2.8m for a UK double, comfortably achievable in a typical terrace or new build bedroom where a UK king would crowd the walls.
- A softer feel that works shared: The medium/soft surface cushions shoulders and hips for side sleepers, while the zoned springs keep spines aligned, so two different sleep positions can share the same bed happily.
- Cheap and easy to dress: Double sheets and a 200 x 200cm duvet are stocked everywhere at every price, handy if you're kitting out a whole home and the budget is stretched.
This size suits you if...
You share the bed every night and want the traditional couples' size in a room where a UK king would leave no space for wardrobes or drawers, or you sleep alone and want proper room to spread out, perhaps with a dog or cat claiming a corner. It also suits a guest room that hosts visiting couples, where the medium/soft feel is gentle enough for most.
Consider another size if...
Your bedroom is 2.7m x 2.9m or larger and you both want more space. The Just Sleep Dream in a UK king is 15cm wider and 10cm longer, and we'd recommend it if the room allows.
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Is the Silentnight Just Sleep Dream UK double big enough for a couple?
For most couples, yes. You get 67.5cm each for two people sharing, and the 1000 Mirapocket springs move independently, so a restless partner is easier to ignore than the width alone suggests. Larger-framed couples, or anyone who sprawls, may find it a little snug, and the UK king adds 15cm of width.
What room size do I need for the Just Sleep Dream in a UK double?
We suggest at least 2.6m x 2.8m, which leaves room to walk round the bed and open drawers. If you want bedside tables on both sides, something closer to 3m x 3m is the comfortable norm. Measure with the wardrobe doors open before you decide; the mattress itself is 135 x 190cm.
Will the UK double fit up narrow stairs and tight landings?
It should, because it arrives rolled and compressed within 48 hours on weekdays, so you carry a cylinder rather than a rigid 135cm-wide slab. That makes turning stairs in older terraces and tight new build landings far more manageable. Once unrolled in the bedroom it expands to its full 27cm depth, so open it where it will stay.
Is the Just Sleep Dream UK double a good choice for a guest room?
It suits one well. The medium/soft feel is forgiving for visiting couples with different sleep styles, and the foam-encapsulated border keeps the edges supportive when two people share the 135cm width. Bear in mind that heavier guests or committed front sleepers may find the surface too yielding, a trait shared by every size of this mattress.
Should I get the Just Sleep Dream in a UK double or size up to the UK king?
If your room comfortably clears our suggested 2.7m x 2.9m for the UK king, the extra 15cm of width and 10cm of length are a real comfort gain for two, especially if either of you is tall. In a smaller room, the UK double keeps space for furniture on both sides. Compare the retailers listed on each page before committing.