Silentnight UltraGel CoolTouch 3000 Firm Mattress
Mattress
Silentnight UltraGel CoolTouch 3000 Firm Mattress
Size
Firmness
Firm
Construction
Depth (cm)
37
Layers
5
Layer Details
- Cool-to-touch sleep surface. SensICE fabric gives an instant cooling effect against your skin, which means you feel a pleasant chill the moment you get in. It draws heat away from your body for a cooler night's sleep.
- Gel infused comfort layer. A responsive gel infused layer that reacts to your movements. As you shift position through the night, it adapts with you rather than leaving you to sink into one spot.
- Breathable foam. Silentnight describes this foam as 5X more breathable than memory foam, which means heat has somewhere to go instead of gathering beneath you. It works alongside the gel layer to keep the sleep surface feeling fresh.
- Plush pillowtop. A plush pillowtop adds a softer, cushioned feel at the surface for soothing relief. It takes a little of the edge off the firm support beneath.
- Pocket spring support system. 2000 Mirapocket springs combine with 1000 mini springs, giving pressure relief that adapts to your shape. Because each spring moves independently, a restless partner is less likely to disturb you.
Layer details from silentnight.co.uk product page, September 2026.
- More room each than a double: The UK king gives you 7.5cm more each than the UK double, enough to stop elbows meeting when one of you rolls over.
- Length for taller sleepers: At 200cm long, the UK king adds 10cm over the UK double, which means feet stay on the mattress for anyone around 6ft or over.
- Calmer nights on split schedules: The 2000 Mirapocket springs move independently, and with extra width between you, an early riser is less likely to wake the partner still asleep.
- Space helps the cooling: A little more distance between two bodies means less shared heat, so the cool-to-touch surface and gel layer have less warmth to deal with.
- Room for a changing routine: During pregnancy, when pillows pile up and positions shift every hour, the UK king leaves a partner a usable strip of firm support.
This size suits you if...
You share the bed every night and keep bumping into each other on a UK double, one of you is tall enough that feet hang off a 190cm mattress, or you get up at different times and want a firm hybrid that keeps each side a little more separate.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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Is the Silentnight UltraGel CoolTouch 3000 UK king big enough for two adults?
For most couples, yes. The UK king gives 75cm each for two people sharing, 7.5cm more each than the UK double. Paired with independently moving pocket springs, that extra width means one partner turning over is felt less on the other side.
Is a UK king long enough if my partner is over 6ft?
The UK king is 200cm long, 10cm longer than the UK double, the UK small double and the UK single. For a tall sleeper, that length is often the real reason to upgrade, more so than the width. In imperial terms, the UK king measures 5ft x 6ft 6in.
Will I feel my partner getting up early on the UK king UltraGel CoolTouch 3000?
Less than on a smaller size. The spring system combines 2000 Mirapocket springs with 1000 mini springs that move independently, and the UK king adds space between you. Across a firm mattress like this, movement tends to stay local, although no sprung mattress removes it completely.
UK king or UK super king in the Silentnight UltraGel CoolTouch 3000?
The UK super king gives 90cm each, 15cm more than the UK king, and suits couples who still feel crowded or share with a dog. It needs a bigger room, though: we suggest at least 3m x 2.9m, against 2.7m x 2.9m for the UK king.
Does a UK king help a hot-sleeping couple stay cool on this mattress?
It can. With 75cm each, you're less likely to lie pressed together, so there's less body heat for the SensICE surface and breathable foam to handle. If you both sleep hot and your room allows it, the extra width of the UK king makes a noticeable difference.