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.
- Room to sleep apart, together: At 75cm each for two people sharing, you can settle into your own space rather than negotiating the middle every night.
- Movement stays on their side: The 3000 Mirapocket springs compress individually, which means an early riser slipping out at 5am is far less likely to wake you across this extra width.
- Length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, which anyone approaching 6ft will feel at their feet immediately.
- Cool surface, more of it: The UltraGel layer is woven into the whole surface, so a warm sleeper gets a cool patch of their own rather than fighting over one.
- A soft feel that needs space: The medium soft cushioning invites side sleepers to spread out, and the wider footprint means you can shift position without nudging a partner.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially with two side sleepers on a softer mattress like this one. It also fits if one of you runs on a different schedule and you want their comings and goings to stay their business, or if someone in the bed is nearing 6ft and keeps finding the end of it.
Consider another size if...
Your bedroom won't comfortably take our suggested minimum of 2.7m x 2.9m, or you sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m and keeps the same soft, cooling feel.
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Is the Silentnight UltraGel 3000 UK king big enough for a couple?
Yes, for most couples it's the comfortable choice. At 150 x 200cm you get 75cm of width each, which matters on a medium soft mattress because side sleepers tend to change position more. The UK king is 15cm wider than the UK double, a difference you notice every night rather than only on paper.
Does the UK king reduce partner disturbance on this mattress?
It helps in two ways. The 3000 Mirapocket springs compress individually, so movement doesn't travel far across the surface, and the extra width puts more distance between you to begin with. If one of you gets up hours before the other, this size gives that spring system room to do its job.
Is the UltraGel 3000 UK king long enough for someone over 6ft?
At 200cm long, it's 10cm longer than the UK double, and that extra length is often the real reason taller sleepers upgrade. The medium soft boxtop cushions shoulders and hips at full stretch rather than leaving feet pressed against the end of the bed.
What room size do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor space rather than the room itself. If you want bedside tables on both sides, the larger figure is the safer target.
How do I find the best price on the UltraGel 3000 UK king?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so what you see reflects the current market for this exact size rather than a snapshot. King is a popular size, so it's worth checking back if you're not buying straight away.