Silentnight UltraGel 2000 Pocket Box Top Mattress
Mattress
Silentnight UltraGel 2000 Pocket Box Top Mattress
Size
Firmness
Medium
Construction
Depth (cm)
33
Layers
3
Layer Details
- UltraGel comfort layer. A gel infused layer that responds as you move, with cooling foam designed to chill and relax your body. In practice, this means less of the heat build-up you can get with standard foam.
- Boxtop. A sumptuous boxtop with advanced gel foam that spreads pressure and bodyweight evenly, which means fewer pressure points at your hips and shoulders. It adapts as you change position through the night.
- Mirapocket springs. 2000 Mirapocket springs, each in its own fabric pocket, so each one responds to your body independently. The zoned support is scientifically proven, according to Silentnight, to improve spinal alignment and posture.
Layer details from silentnight.co.uk product page, September 2026.
- 75cm each for two sharing: Each of you gets 75cm of width, which means room to change position without elbowing your partner awake.
- Pocket springs limit disturbance across the width: The 2000 Mirapocket springs respond individually, so if one of you gets up hours before the other, movement stays on your side of the bed.
- 200cm length for taller sleepers: At 6ft 6in long, the UK king gives anyone approaching six foot proper clearance, without their feet meeting the end of the mattress.
- Cooling that matters more when sharing: Two bodies generate more heat than one, and the gel infused comfort layer is designed to draw that warmth away.
- Soft comfort across a bigger surface: The medium soft boxtop cushions hips and shoulders evenly, which suits side-sleeping couples who each want that sink-in feel on their own patch.
This size suits you if...
You share the bed every night and a double no longer feels like enough room, one of you keeps different hours and you're tired of feeling every exit and return, or one of you is tall enough that a standard-length mattress leaves feet hanging. The 150 x 200cm footprint solves all three, provided your room meets our suggested 2.7m x 2.9m minimum.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m minimum for a UK king. We'd recommend the UK double instead; it's 15cm narrower and 10cm shorter, and we suggest at least 2.6m x 2.8m for it.
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Is the Silentnight UltraGel 2000 in a UK king big enough for a couple?
Yes, comfortably for most. At 150cm wide it gives two people 75cm each, noticeably more personal space than a double. That extra width matters on a medium soft mattress like this one, because you can settle into your own spot without rolling towards each other. Lightweight solo sleepers may find the size more than they need.
Will my partner getting up early wake me on the UltraGel 2000 UK king?
Less than you might expect. The 2000 pocket springs each sit in their own fabric pocket and compress independently, so movement doesn't travel far across the mattress. Combined with the 75cm of width each sleeper gets in a UK king, a partner slipping out at dawn is much easier to sleep through than on a double.
Is a UK king UltraGel 2000 long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than a UK double, and that difference is often the real reason taller sleepers upgrade. Anyone approaching six foot gets proper clearance rather than heels at the edge. If your height is the main issue, know that the UK super king is the same length, so sizing up buys width, not extra length.
What size bedroom do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m for a UK king, which leaves enough room to walk round the bed and open drawers. New build master bedrooms can shrink quickly once fitted wardrobes go in, so measure the usable floor space rather than the room on the plan. If you're under that, the UK double needs at least 2.6m x 2.8m.
Should I choose the UK king or the UK super king in this mattress?
The UK king is 30cm narrower than the UK super king, and both are the same length. If a dog joins you most nights or you both spread out, the UK super king earns that extra width, but we suggest at least 3m x 2.9m of room for it. For most couples the UK king is the comfortable middle ground. Compare the retailers listed on this page for current prices in both.