Last seen for £443.38 at Archers Sleepcentre on 8th September 2026
Silentnight Just Sleep Bliss Gel Mirapocket 1000 Double Mattress in a Box
The Silentnight Just Sleep Bliss Gel Mirapocket 1000 is a rolled mattress that arrives compressed in a box, which means it's easier to get up stairs and into the bedroom than a traditional flat delivery.
- Gentle medium-soft feel
- Zoned support for spinal alignment
- Hypoallergenic soft-knit surface
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £358.10 at Archers Sleepcentre on 8th September 2026
Last seen for £488.58 at Archers Sleepcentre on 8th September 2026
Last seen for £443.38 at Archers Sleepcentre on 8th September 2026
Mattress details
Mattress
Silentnight Just Sleep Bliss Gel Mirapocket 1000 Mattress in a Box
Size
Firmness
Medium Soft
Construction
Pocket Spring
Rolled
Gel
Depth (cm)
Layers
2
Layer Details
Gel-infused comfort layer
A gel-infused comfort layer at the top of the mattress. For you, that means a soft, comfortable surface to settle into at night.
Mirapocket spring unit
1000 Mirapocket springs that respond independently to your body's movements, with zoned support. This means the springs adjust to each part of your body, which Silentnight says improves spinal alignment.
Layer details from marksandspencer.com product page, October 2026.
Key benefits
- The classic size for two: At 135cm wide, the UK double gives two people 67.5cm each, the long established starting point for couples sharing a bed.
- Fits most UK bedrooms: Allow at least 2.6m x 2.8m and you'll still have room for a wardrobe and drawers, where a UK king might dominate the space.
- Room for bedside tables: In an average room, the UK double usually leaves enough clearance for a bedside table on both sides, something a wider bed can rule out.
- Boxed delivery suits awkward access: Because it arrives compressed in a box, this mattress copes with the turning stairs of older terraces and tight new build landings better than a flat delivered double.
- Easy, affordable bedding: Double sheets and 200 x 200cm double duvets are sold everywhere at every price point, which keeps dressing the bed cheap and simple.
This size suits you if...
You're a couple in a typical UK bedroom and want the traditional shared size without giving up floor space, you're furnishing a guest room where visiting couples will stay, or your bedroom sits up a narrow or turning staircase and a boxed mattress is the practical way to get a double bed into the room.
Consider another size if...
You and your partner both like to spread out, or one of you is a restless sleeper, and your room measures at least 2.7m x 2.9m. The UK king is 15cm wider and 10cm longer, and we'd recommend it instead.
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FAQ's
Is the Silentnight Bliss Gel Mirapocket 1000 double big enough for two adults?
It gives two people 67.5cm each, which most couples find comfortable, although if either of you sleeps starfished or moves around a lot, that shared width can start to feel snug. If your room allows at least 2.7m x 2.9m, the UK king adds 15cm of width and 10cm of length.
What room size do I need for this mattress in a UK double?
We suggest a room of at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows space to walk around the bed and, in most layouts, a bedside table on each side. These are our recommendations rather than Silentnight's, so measure your own room before ordering.
Will the boxed UK double fit up a narrow staircase?
This is where a rolled mattress helps. The UK double is delivered compressed in a box rather than flat, so it's much easier to carry around the turning stairs of an older terrace or across a tight new build landing. Silentnight doesn't publish the boxed dimensions, so check with the retailer if your access is especially tight.
How does the UK double compare with the UK king in this mattress?
The UK double is 15cm narrower and 10cm shorter than the UK king. That makes the double the better fit where floor space is limited, while the king suits couples with a larger room, at least 2.7m x 2.9m by our guidance. Both sizes of this Silentnight are sold rolled in a box.
Is the double a good choice for a guest room?
Yes, with one caveat. A UK double lets visiting couples share comfortably and still fits alongside a wardrobe in most spare rooms, and the boxed delivery makes getting it upstairs straightforward. The caveat: if guests will only ever sleep solo, the UK single is 45cm narrower, the same length, and frees up floor space.