Silentnight UltraGel 2000 Pocket Box Top Mattress
Mattress
Silentnight UltraGel 2000 Pocket Box Top Mattress
Size
Firmness
Medium
Construction
Depth (cm)
33
Layers
3
Layer Details
- UltraGel comfort layer. A gel infused layer that responds as you move, with cooling foam designed to chill and relax your body. In practice, this means less of the heat build-up you can get with standard foam.
- Boxtop. A sumptuous boxtop with advanced gel foam that spreads pressure and bodyweight evenly, which means fewer pressure points at your hips and shoulders. It adapts as you change position through the night.
- Mirapocket springs. 2000 Mirapocket springs, each in its own fabric pocket, so each one responds to your body independently. The zoned support is scientifically proven, according to Silentnight, to improve spinal alignment and posture.
Layer details from silentnight.co.uk product page, September 2026.
- Fits where bigger sizes can't: At 3ft x 6ft 3in, this size slots into box rooms, loft conversions and spare rooms that double as an office, and we suggest just 2.1m x 2.8m of floor space.
- Soft comfort for lighter sleepers: The medium soft boxtop gives at hips and shoulders, which means lighter bodies, including children and teens, actually sink into the comfort layer rather than perching on top of it.
- Cooling in a small room: The gel infused layer draws heat away, useful in compact bedrooms and lofts where warm air has nowhere to go on summer nights.
- Two singles beat one double for sharing siblings: In a shared children's room, a pair of UK singles with a walkway between usually works better than one larger bed, and this size makes that layout possible.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and they're the most widely stocked and least expensive bedding of any UK size.
This size suits you if...
You're buying for a child or teenager who finds firm mattresses uncomfortable, you sleep alone and want a plush, cushioned feel without giving up floor space, or you're kitting out a guest room or spare room that also has to hold a desk and storage. It also suits student rooms and first flats where the frame is already provided and you only need the mattress.
Consider another size if...
You're an adult who wants space to spread out, or you share the bed even occasionally. A UK single is 30cm narrower than the UK small double, so we'd recommend the UK small double instead if you can allow at least 2.4m x 2.8m of floor space.
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What are the dimensions of the Silentnight UltraGel 2000 in a UK single?
The UK single measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so any single bed frame, single fitted sheets and a standard 135 x 200cm single duvet will fit without any hunting for special sizes.
Will the UK single UltraGel 2000 fit a bunk or mid sleeper frame?
The width matches standard bunk and mid sleeper frames, but this mattress is 33cm deep, which is a lot for a raised bed. Most bunk manufacturers set a maximum mattress depth so the safety rail still sits well above the sleeping surface, so measure your frame's rail height before buying. For a top bunk, a slimmer mattress is usually the safer choice.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves enough room to walk alongside the bed and open drawers or a wardrobe, which matters in a child's room where the bed competes with toy storage and a desk. In a loft conversion, the narrow 90cm footprint also tucks neatly under a sloping ceiling.
Is the UltraGel 2000 UK single a good mattress for a child or teenager?
It can be, with one caveat. The medium soft feel and gel boxtop suit lighter bodies well, because children and teens get proper cushioning from the comfort layer rather than lying on a surface too firm to compress. Some parents prefer a firmer mattress for growing spines, though, so consider your child's sleeping position and weight before deciding.
Should I buy the UltraGel 2000 in a UK single or a UK small double?
The UK single is 30cm narrower than the UK small double, and the two are the same length. For a child, teen or a tight guest room, the UK single is the practical pick. If a solo adult wants more room to stretch out and the bedroom offers at least 2.4m x 2.8m, the UK small double is the more comfortable long-term choice.