Silentnight UltraGel 3000 Mirapocket Box Top Softer Single 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
£678
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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
- Leaves room for everything else: At 3ft x 6ft 3in, the UK single keeps a clear strip of floor for a desk, wardrobe or toy boxes in a smaller bedroom.
- Soft feel for lighter sleepers: The box top is a cushioned layer sewn onto the surface, which means children and slim adults sink in comfortably rather than lying on top.
- Two can fit in one guest room: A pair of UK singles lets a spare room sleep two visitors separately, and the pocket springs give each sleeper a supportive base.
- Suits a room under a sloping ceiling: The narrow UK single footprint can tuck along the low side of a loft conversion, where a wider mattress would push into usable headroom.
- Simple to turn round: Box top designs can't be flipped, only rotated, and a UK single is far easier for one person to swing round than a larger size.
This size suits you if...
You sleep alone and prefer a softer surface you settle into, or you're kitting out a child's or teenager's room where the bed has to share floor space with a desk and wardrobe. It also fits a spare room that works as an office most of the week.
Consider another size if...
You're an older teen or adult who sprawls and already feels squeezed on a 90cm width. We'd recommend the UK small double instead, which is 30cm wider; allow at least 2.4m x 2.8m.
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FAQ's
Is the Silentnight UltraGel 3000 box top single good for a child?
For most children, yes. The soft box top suits lighter bodies, which sink in enough to feel cushioned while the pocket springs underneath provide support. A UK single also leaves room for storage and a desk. It's less suited to a child who sleeps on their front, as soft mattresses can let the hips dip.
Will the UltraGel 3000 single fit a cabin or mid sleeper bed?
The UK single width and length suit these frames, but Silentnight doesn't publish a depth for this mattress. A box top sits higher than a standard surface, so check the frame maker's maximum mattress depth and confirm the guard rail still stands well above the sleeping surface before buying for a raised bed.
How much floor space does a UK single UltraGel 3000 need?
We suggest allowing at least 2.1m x 2.8m for a UK single, which gives you room to walk round the bed and open drawers. For two singles side by side in a shared or guest room, plan for a walkway between them as well as the beds themselves.
Is a UK single mattress long enough for a tall adult?
The UK single is 190cm long, the same as the UK small double and UK double. If your feet reach the end, the UK king is 10cm longer, though it's also 60cm wider and we suggest at least 2.7m x 2.9m of floor space for it.
Should I get a single or small double UltraGel 3000 for a teenager?
If the room is compact, the UK single keeps the floor usable. If your teenager is growing fast or likes to spread out, the UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m for it. Compare the retailers listed on this page for both.