Silentnight UltraGel 3000 Cool-To-Touch Boxtop Medium Soft Mattress
Mattress
Silentnight UltraGel 3000 Cool-To-Touch Boxtop Medium Soft Mattress
Size
Firmness
Medium Soft
Construction
Depth (cm)
Layers
2
Layer Details
- UltraGel™ cool-to-touch layer. Cooling technology woven directly into the surface fabric, so the mattress feels cool from the moment you lie down. Silentnight claims five times greater breathability than standard memory foam, which means less of that trapped, clammy heat foam is known for.
- Mirapocket® springs. A base of 3000 Mirapocket springs, each one pocketed so it compresses individually under your weight. You feel targeted support at your hips and shoulders rather than a uniform push back.
Layer details from mattressman.co.uk product page, September 2026.
- 90cm each, every night: Two people sharing get 90cm each, which means a partner who shifts and turns is far enough away that you barely register it.
- Motion isolation with distance behind it: The 3000 Mirapocket springs compress individually to limit disturbance, and at this width the movement is happening well away from you anyway.
- Room for the whole household: When children wander in at 3am or the dog claims a corner, a UK super king still leaves both adults a usable share of the bed.
- Cooling that matters more with company: More bodies mean more heat, and the UltraGel cool-to-touch surface counters exactly the warmth a full bed builds up.
- Soft feel across a generous surface: The medium soft cushioning suits side sleepers, and the full 6ft x 6ft 6in footprint means each sleeper settles into it without drifting toward the other.
This size suits you if...
You share the bed every night and one of you sleeps restlessly, so distance matters as much as the mattress itself. Or your children or pets treat your bed as theirs too, and a UK king leaves everyone squeezed. You'll also want a genuinely large bedroom: we suggest at least 3m x 2.9m, and this size can look at home in a big master where a king seems undersized.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest for a UK super king, or you sleep alone. We'd recommend the UK king instead, which is 30cm narrower and the same length, and needs at least 2.7m x 2.9m.
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What room size do I need for a super king Silentnight UltraGel 3000?
We suggest a room of at least 3m x 2.9m for a UK super king. That allows walking space on both sides and room for bedside tables. If your bedroom is smaller, the UK king is 30cm narrower and the same length, and we suggest at least 2.7m x 2.9m for that size.
Is the UltraGel 3000 super king big enough for co-sleeping with children?
It's the best size in the range for it. Two adults sharing get 90cm each, so when a child climbs in during the night there's still a workable share for everyone. The pocketed springs also limit how much you feel a small visitor wriggling, which helps everyone stay asleep.
How much wider is the super king than the king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length. That extra width is the difference between sharing comfortably and sharing tolerably if one of you is restless, though it does demand a bigger room: allow at least 3m x 2.9m rather than 2.7m x 2.9m.
Will a super king UltraGel 3000 get up the stairs?
At 180 x 200cm it's the hardest size in the range to move. Measure your stairwell, landing turns and the bedroom door swing before ordering, because a mattress this wide can defeat a tight Victorian staircase. If access is doubtful, the UK king is 30cm narrower and slightly easier to manoeuvre.
Does the medium soft feel work for two sleepers of different weights?
The 3000 Mirapocket springs compress individually, so a heavier partner sinking further doesn't tilt your side. The medium soft feel remains soft for both of you, though. If one of you weighs more than average or prefers a firm surface, this mattress may be too soft at any size.