Silentnight Mirapocket 1200 Memory Super King Mattress
The Silentnight Mirapocket 1200 Memory Mattress is a pocket sprung mattress with a memory foam comfort element from Silentnight, one of the UK's biggest bed brands.
- Springs respond to your body
- Memory layer softens the surface
- Less movement across the bed
£596.97
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Silentnight Mirapocket 1200 Memory Mattress
More available sizes
Mattress details
Mattress
Silentnight Mirapocket 1200 Memory Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Memory Foam
Depth (cm)
Layers
Layer Details
Key benefits
- Pocket springs work best with distance: The 1200 pocket springs move independently, which means a partner turning over barely registers, and at 90cm each you're often too far apart to feel it anyway.
- Room for the whole household: When children pad in at 3am or the dog claims a corner, 180cm of width means everyone still gets a genuine share of the bed.
- 30cm wider than the UK king: The UK super king is 30cm wider than the UK king and the same length, and that extra width is where the undisturbed sleep comes from.
- Memory foam without the crowding: Memory foam holds a little warmth, but with this much space you can spread out rather than sleep pressed together, which takes the edge off on warm nights.
- A size that suits a big room: In a period property or a generous new build master, a UK king can look slightly lost; the super king fills the space properly.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets treat your bed as theirs too. Your room should measure at least 3m x 2.9m, and closer to 3.5m x 3.2m will feel comfortable around it.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum, or you'd struggle to get a 180cm mattress up the stairs and round the landing. We'd recommend the UK king instead, which is 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How big is the Silentnight Mirapocket 1200 Memory in a UK super king?
It measures 180 x 200cm, which is 6ft x 6ft 6in. That makes it 30cm wider than the UK king and 45cm wider than the UK double, with an extra 10cm of length over the double as well. Two people sharing get 90cm each, the width of a full single bed per person.
What room size do I need for a super king Mirapocket 1200?
We suggest a minimum of 3m x 2.9m, with around 3.5m x 3.2m feeling right once you add bedside tables and space to walk around. Measure the room before ordering, and check door swing and any tight landing turns too: a 180cm-wide mattress is the hardest standard size to manoeuvre upstairs.
Is the UK super king worth it over the UK king for this mattress?
If your partner is restless, yes. The pocket springs already isolate movement, and the UK super king adds 30cm of width on top, so most disturbance simply stops reaching you. The UK king is the same length and suits rooms from 2.7m x 2.9m, so it remains the better call in a smaller bedroom.
Is this size good for sharing with children or pets?
It's the best case for it. At 180cm wide, a child climbing in during the night or a dog settling at the foot end still leaves both adults a workable stretch of mattress, and the independent pocket springs mean their fidgeting doesn't travel across the bed to you.
Does memory foam get too warm on a mattress this size?
Memory foam does hold some warmth, and that doesn't change with size. What the UK super king changes is proximity: with 90cm each, you're sharing less body heat than on a UK double or UK king. Committed hot sleepers may still prefer a model with a cooling top layer.