Silentnight UltraGel 1200 Pocket Pillowtop Mattress
Mattress
Silentnight UltraGel 1200 Pocket Pillowtop Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
3
Layer Details
- UltraGel layer. A gel infused layer that responds to your movements and provides a cooling sensation. In practice, that means the surface should feel less heat-retentive than standard foam.
- Pillowtop. A plush pillowtop sewn on top for extra comfort and pressure relief to soothe aches and pains. This is what gives the mattress its softer initial feel before you reach the support layers.
- Mirapocket springs. 1200 Mirapocket springs provide zoned support, with each individual pocket spring adjusting to your body weight. That translates to ease of movement and a more undisturbed night's sleep if you share the bed.
Layer details from silentnight.co.uk product page, September 2026.
- A grown-up mattress in a compact size: You get the full pillowtop and gel infused comfort layer at 90cm wide, which means a small room does not force you into a basic mattress.
- Room to live around the bed: At 3ft wide it leaves floor space for a desk, wardrobe or toy storage, useful where the bed is competing with everything else in the room.
- Kind to growing bodies: The medium feel with a cushioned pillowtop suits side-sleeping children and teens, giving pressure relief without the hardness of many budget kids' mattresses.
- Sensible for a spare room: In a study that doubles as guest space, a UK single keeps the room usable day to day while still giving visitors proper spring support.
- Cheap, easy bedding: Standard single sheets and duvets are the most widely stocked of any size, so keeping a child's or guest bed made up costs little.
This size suits you if...
You're buying for a child or teenager who has outgrown a starter mattress, you sleep alone in a compact room or first flat where every centimetre of floor space matters, or you're kitting out a spare room that needs to work as an office too. The plush pillowtop suits kids and lighter adults who sleep on their side.
Consider another size if...
You're an adult who tends to sprawl, or you sleep in the same bed most nights and find 90cm restrictive. We'd recommend the UK small double instead: it's 30cm wider, the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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How big is the Silentnight UltraGel 1200 in a UK single?
The UK single measures 90 x 190cm, or 3ft x 6ft 3in. That is the standard UK one-person size, so it fits ordinary single bed frames, single fitted sheets and a standard single duvet without any hunting for unusual bedding.
Is the UK single UltraGel 1200 a good mattress for a child?
For most children and teens, yes. The medium feel with a cushioned pillowtop is gentler on smaller, lighter bodies than a firm budget mattress, and the pocket springs give proper support as they grow. It is more mattress than a very young child needs, so treat it as one to grow into rather than a toddler's first bed.
Will the UK single UltraGel 1200 fit a bunk or mid sleeper frame?
The 90 x 190cm footprint matches standard bunk and mid sleeper frames, but the depth is the thing to check. At 28cm this is a deep mattress, and many raised frames set a maximum depth so the guard rail still does its job. Check your frame's limit before buying; some bunks cap out well below 28cm.
What room size do I need for a UK single mattress?
We suggest at least 2.1m x 2.8m of floor space for a UK single. That leaves enough clearance to walk around, open drawers and change the bedding. In a shared children's room with two singles and a walkway, or a loft room with sloping ceilings, measure the usable floor rather than the full room.
Should I buy the UK single or the UK small double UltraGel 1200?
If the sleeper is a child, a teen or an adult in a genuinely small room, the UK single is the practical pick. A solo adult with a bit more space may prefer the UK small double: it is 30cm wider, the same length, and we suggest at least 2.4m x 2.8m of floor space for it. Compare the retailers listed on this page for both.