Silentnight UltraGel Miracoil Pillowtop Mattress
Mattress
Silentnight UltraGel Miracoil Pillowtop Mattress
Size
Firmness
Construction
Depth (cm)
29
Layers
2
Layer Details
- UltraGel™ comfort layer. A gel infused layer that sits at the top and responds to your movements, which means cushioning that adapts as you shift position. Silentnight describes it as offering supreme comfort with strong pressure relief, so it should ease strain around hips and shoulders.
- Miracoil® springs. This spring system runs from head to toe rather than side to side, which is designed to keep your spine aligned through the night. It also helps prevent partner disturbance, so movement on one side of the bed transfers less to the other.
Layer details from silentnight.co.uk product page, September 2026.
- Room to spread out alone: It is 30cm wider than the UK single, so you can sleep sprawled or diagonally while the gel layer eases pressure at your hips as you move.
- Keeps a small room usable: Being 15cm narrower than the UK double, it can leave space for a wardrobe door to swing open or a bedside table to fit in a box room.
- Calmer for occasional sharing: The Miracoil springs run head to toe and limit how much movement crosses the bed, which means a visiting couple should disturb each other a little less.
- No extra length to find room for: It matches the 190cm length of the UK single and UK double, so you gain width without the bed reaching further into a tight room.
- Simple to kit out: The 4ft width is a mainstream UK frame size, which means frames and fitted sheets are easy to source, and you can compare live prices from the retailers shown here.
This size suits you if...
You sleep alone and have outgrown a UK single, your bedroom is too tight for anything wider but you still want a proper double feel, or you need a guest bed that handles an occasional couple without swallowing a box room.
Consider another size if...
Two of you share the bed every night. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m for the UK double.
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Will a Silentnight UltraGel Miracoil small double fit in a box room?
We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves space to walk round the bed and open the door. Measure where the door swings and any radiator, because width is usually what decides whether a compact room still works.
Is the UltraGel Miracoil Pillowtop small double a good upgrade from a single for a teenager?
It can be. The UK small double is 30cm wider than the UK single yet the same length, so it takes little more floor. The medium/firm feel suits back and front sleepers, although a light teenager who sleeps on their side may find it a little too firm at the shoulder.
Is a small double UltraGel Miracoil big enough for guests sharing?
For the odd weekend, yes. The Miracoil springs reduce how much one person's movement reaches the other, which helps on a narrower bed. For nightly sharing we'd recommend the UK double, which gives 67.5cm each and needs a room of at least 2.6m x 2.8m.
Should one person choose the small double or double in the Silentnight UltraGel Miracoil?
If your room allows at least 2.6m x 2.8m, the UK double gives you 15cm more width at the same length. If space is tighter, the UK small double keeps the floor clear while still feeling roomy for one adult, and it needs at least 2.4m x 2.8m.
Is the UltraGel Miracoil small double long enough if I'm tall?
The UK small double is 190cm long, the same as the UK double. If your feet reach the end, the UK king is 10cm longer, but it is also 30cm wider, and we suggest a room of at least 2.7m x 2.9m for the UK king.