Silentnight 800 Mirapocket Mattress
Mattress
Silentnight 800 Mirapocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
26
Layers
2
Layer Details
- Eco Comfort Fibre. A comfort layer made from sustainable materials including repurposed plastic. It's highly breathable, which means air circulates freely through the mattress for a fresher, cooler feel through the night.
- Mirapocket Springs. 800 individual pocket springs, zoned to give targeted relief to your back, joints and hips. Because each spring moves independently, the mattress responds to your body shape and absorbs movement, so a restless partner is less likely to wake you.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm of width each: Two people sharing get 90cm apiece, which means a restless partner can turn over all night without ever crossing into your half.
- Springs plus space against disturbance: The 800 individual pocket springs absorb movement where it happens, and at this width most movement happens too far away to reach you anyway.
- Room for night-time visitors: When a child pads in at 3am, or the dog treats the bed as theirs, a super king still leaves the adults a proper share.
- Breathable across a big surface: The Eco Comfort Fibre layer lets air move through the mattress, useful when two warm bodies share one bed every night.
- The right scale for a large room: In a big master bedroom a UK king can look oddly small; at 6ft x 6ft 6in this size fills the space properly.
This size suits you if...
You share the bed every night and want the most space a standard UK size offers, your partner is genuinely restless and you'd rather have distance than rely on comfort layers alone, or children and pets regularly join you and a UK king has started to feel crowded. Your room should comfortably clear our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you'd struggle to get a mattress this size round your landing. We'd recommend the UK king instead: 30cm narrower, the same length, and it needs a room of at least 2.7m x 2.9m.
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How big is the Silentnight 800 Mirapocket in a super king?
It measures 180 x 200cm, or 6ft x 6ft 6in. That makes it 30cm wider than the UK king, though the two are the same length. It's the largest size UK retailers stock as standard, and at 26cm deep it takes standard super king fitted sheets.
How much space do two people get on a super king 800 Mirapocket?
90cm each for two people sharing. Combined with the 800 pocket springs, which move independently and absorb motion rather than passing it across the bed, that width means a partner who tosses and turns is far less likely to wake you than on a smaller size.
What room size do I need for the 800 Mirapocket super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels right, with space to walk round both sides and open wardrobes without squeezing past. Measure before you order, and check door swings and any tight landing turns while you're at it.
Should I choose the 800 Mirapocket in a UK king or super king?
If your room clears 3m x 2.9m and you share with a restless partner, children or a large dog, the extra 30cm of width is the whole point of the super king. In a room nearer our UK king minimum of 2.7m x 2.9m, the UK king is the more sensible fit.
Is a super king pocket spring mattress hard to get upstairs?
It can be. This is a sprung mattress, so it won't arrive rolled in a box the way foam models do, and 180cm of width is awkward on narrow staircases and tight landings. Measure the tightest turn on the route to your bedroom before ordering, including door frames.