Silentnight UltraGel 3000 Mirapocket Box Top Softer Small Double Mattress
The Silentnight UltraGel 3000 Mirapocket Box Top Softer is a hybrid mattress with a soft feel, pairing pocket springs with a box top, which means an extra cushioned layer sewn on top for a plusher surface than a standard mattress.
- Soft feel for side sleepers
- Minimises partner disturbance
- Cushioned box top from night one
£904
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Silentnight UltraGel 3000 Mirapocket Box Top Softer Mattress
More available sizes
Mattress details
Mattress
Silentnight UltraGel 3000 Mirapocket Box Top Softer Mattress
Size
Firmness
Soft
Construction
Foam
Pocket Spring
Hybrid
Gel
Depth (cm)
Layers
2
Layer Details
UltraGel comfort layer
A gel-infused foam layer that Silentnight says responds to your movements. In practice, that means it should adjust as you shift position, so you can toss and turn without feeling stuck in one spot.
Mirapocket and mini springs
This layer combines 2000 Mirapocket springs with 1000 mini springs, giving zoned support. The idea is that different areas of your body get the support they need, which helps balance the soft top with a more stable base.
Layer details from silentnight.co.uk product page, October 2026.
Key benefits
- Space to spread out alone: At 30cm wider than the UK single, you can shift between positions on the soft box top without finding yourself close to the edge.
- Fits tighter double rooms: Being 15cm narrower than the UK double, it leaves a little more floor for a bedside table or door swing, and we suggest allowing at least 2.4m x 2.8m.
- Calmer for the odd shared night: The pocket springs move independently, which means a guest turning over is less likely to jolt the person beside them during an occasional stay.
- A comfortable step up from a single: The UK small double is the same length as the UK single, so a teenager moving on gains width for sprawling while the bed keeps a similar footprint lengthways.
- Easy to dress: 4ft is a standard UK size, which means small double fitted sheets are simple to find and a standard double duvet covers it comfortably.
This size suits you if...
You sleep alone and like room to sprawl on a soft, sink-in surface, your bedroom is a compact double or a loft conversion where every centimetre of floor counts, or you're kitting out a guest room that only sees couples now and then.
Consider another size if...
You share the bed every night, since two people settling into a soft top will feel short of room. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m.
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FAQ's
Is the Silentnight UltraGel 3000 small double big enough for a teenager?
For most teenagers outgrowing a single, yes. The UK small double is 120 x 190cm, 30cm wider than the UK single but the same length, so they gain sprawling room rather than legroom. If your teenager is already tall for a 190cm bed, the UK king is 10cm longer, though it needs far more floor space.
Will a UK small double UltraGel 3000 fit in a loft conversion bedroom?
Often, yes. We suggest a room of at least 2.4m x 2.8m for the UK small double. Because it is 15cm narrower than the UK double, you keep a little more standing room beside the bed, which helps where a sloping ceiling limits how far you can walk upright.
Can couples use the UltraGel 3000 Box Top Softer in a small double for guests?
For the odd weekend, it works well. The pocket springs limit disturbance when one guest moves, and the soft box top feels settled from the start. For couples sleeping together every night, the UK double gives 67.5cm each and we suggest a room of at least 2.6m x 2.8m.
What size is the Silentnight UltraGel 3000 small double in feet?
The UK small double version measures 4ft x 6ft 3in, which is 120 x 190cm. Check your bed frame is sold as a 4ft or small double frame, as a 4ft 6in frame is built for the UK double and would leave a gap around this mattress.
Should I get the UltraGel 3000 in a small double or a single for one person?
If you like to stretch out, the UK small double gives you 30cm more width, which suits the sink-in feel of a soft mattress. The UK single makes sense in a smaller room: we suggest at least 2.1m x 2.8m for the UK single, against 2.4m x 2.8m for the UK small double.