Last seen for £425.11 at Archers Sleepcentre on 8th September 2026
Silentnight Just Sleep Breathe Mirapocket 1000 King Size Mattress
The Silentnight Just Sleep Breathe Mirapocket 1000 is a pocket sprung mattress from Silentnight, one of the UK's best-known bed brands.
- Zoned support where you need it
- Breathable layer helps you sleep cooler
- Soft hypoallergenic cover
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 £425.11 at Archers Sleepcentre on 8th September 2026
Last seen for £388.47 at Archers Sleepcentre on 8th September 2026
Last seen for £321.62 at Archers Sleepcentre on 8th September 2026
Mattress details
Mattress
Silentnight Just Sleep Breathe Mirapocket 1000 Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Depth (cm)
Layers
Layer Details
Key benefits
- Room to sleep apart, together: The UK king is 15cm wider than the UK double, which means each of you can settle without negotiating the middle of the bed.
- Springs plus space against disturbance: Pocket springs absorb movement individually, so on a 150cm width a restless partner or an early alarm is far easier to sleep through.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a real difference if either of you is approaching six foot.
- A popular size to shop around: King is one of the most widely made UK sizes, so bedding and bases in 5ft x 6ft 6in are easy to find.
- Fits a normal master bedroom: We suggest at least 2.7m x 2.9m, which most UK master bedrooms can manage, unlike the demands of a super king.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, especially if one of you gets up hours before the other. It also suits couples where one partner is tall, because the 200cm length adds 10cm over a double, or households where the dog treats the bed as its own and you keep losing your share.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m minimum, or you sleep alone most nights. The UK double would suit you better, and we suggest at least 2.6m x 2.8m for that size.
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FAQ's
Is the Mirapocket 1000 in a UK king big enough for a couple?
Comfortably, for most. The UK king measures 150 x 200cm, giving 75cm each for two people sharing, and its 1000 pocket springs move independently, so one person shifting disturbs the other less. If you're a couple who currently share a double and keep waking each other, this size addresses both space and movement.
What room size do I need for a UK king mattress?
We suggest a room of at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. That allows walking space and bedside tables on both sides. If your room falls short, the UK double is 15cm narrower and 10cm shorter, and we suggest at least 2.6m x 2.8m for it.
Is the UK king Mirapocket 1000 long enough for a tall sleeper?
The UK king is 200cm long, 10cm more than the UK single, small double or double, so anyone approaching six foot gains genuinely useful legroom. Silentnight doesn't publish a full depth or construction breakdown for this model, so if overall height matters to you, check the retailer listing before buying.
Should I go up to a super king instead of a king?
The UK super king is 30cm wider than the UK king but the same length, so you gain elbow room rather than legroom, and we suggest a room of at least 3m x 2.9m for it. Note that this Silentnight model isn't offered in a super king, so the UK king is its largest size.
Where can I compare prices for the Mirapocket 1000 in a UK king?
Use the live price table on this page. The prices shown here are updated as retailers change them, so it's a more reliable picture than a figure printed in the text. Because full specs for this model are slightly thin, the retailer listing is also the place to confirm firmness and depth before you commit.