Silentnight UltraGel 1200 Pocket Pillowtop Mattress
Mattress
Silentnight UltraGel 1200 Pocket Pillowtop Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
3
Layer Details
- UltraGel layer. A gel infused layer that responds to your movements and provides a cooling sensation. In practice, that means the surface should feel less heat-retentive than standard foam.
- Pillowtop. A plush pillowtop sewn on top for extra comfort and pressure relief to soothe aches and pains. This is what gives the mattress its softer initial feel before you reach the support layers.
- Mirapocket springs. 1200 Mirapocket springs provide zoned support, with each individual pocket spring adjusting to your body weight. That translates to ease of movement and a more undisturbed night's sleep if you share the bed.
Layer details from silentnight.co.uk product page, September 2026.
- Proper space for two: The UK king is 15cm wider than the UK double, which means each of you gets room to shift position without waking the other.
- Length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a genuine relief if one of you is approaching six foot.
- Different schedules, fewer wake-ups: The 1200 Mirapocket springs respond individually, so an early riser slipping out at 5am is far less likely to disturb the person still asleep.
- Cooler across a bigger surface: The gel infused comfort layer is designed to feel less heat-retentive than plain foam, useful when two bodies are warming the same bed.
- Soft on top, support underneath: The plush pillowtop cushions shoulders and hips at this width, while the pocket springs keep each sleeper supported on their own side.
This size suits you if...
You share the bed every night and the UK double has started to feel like a compromise, one of you keeps different hours and needs to get up without waking the other, or one of you is tall enough that the extra length matters as much as the width. It also suits couples whose dog has quietly claimed a share of the mattress.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which is 15cm narrower and needs at least 2.6m x 2.8m.
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Is the Silentnight UltraGel 1200 in a UK king big enough for a couple?
Yes, comfortably for most. The UK king gives 75cm each for two people sharing, and the 1200 Mirapocket springs support each side independently, so one restless sleeper affects the other less. If you regularly share with a child or a large dog as well, the UK super king, 30cm wider, may suit you better.
Should I buy the UltraGel 1200 in a UK king or a UK double?
If your room can take it, the UK king. It is 15cm wider and 10cm longer than the UK double, and on a plush pillowtop mattress like this, where you sink in slightly, that extra width makes rolling over without nudging your partner much easier. Allow at least 2.7m x 2.9m of floor space for the UK king.
Is the UK king UltraGel 1200 long enough for someone over six foot?
At 200cm long, or 5ft x 6ft 6in in old money, the UK king should suit sleepers a little over six foot without their feet hanging off the end. That is 10cm more length than the UK double, so if height is your main frustration, this size solves it. The UK super king is the same length, so sizing up only adds width.
Does a UK king reduce partner disturbance on this mattress?
The size and the springs work together here. The 1200 individual pocket springs limit how much movement travels across the mattress, and the extra width of the UK king means you are physically further from your partner's tossing and turning. Couples on different schedules, where one gets up hours before the other, tend to feel that difference most.
How do I find the best price on the UltraGel 1200 in a UK king?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so what you see reflects current pricing for this exact size rather than a headline figure for the smallest one. King is a popular size for this model, so it is worth checking more than one retailer before you commit.