Silentnight Healthy Growth Eco Memory Bunk Single Mattress
The Silentnight Healthy Growth Eco Memory Bunk Mattress is a hybrid designed with bunk beds in mind, and its slim 15cm depth is the reason: it sits safely below guard rails where a deeper mattress wouldn't.
- Fits bunk, cabin & trundle beds
- Cocooning fibres that stay cool
- 60-night trial & 5-year guarantee
£189
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Silentnight Healthy Growth Eco Memory Bunk Mattress
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Mattress details
Mattress
Silentnight Healthy Growth Eco Memory Bunk Mattress
Size
Firmness
Medium Firm
Construction
Hybrid
Memory Foam
Open Coil Spring
Eco-Friendly
Depth (cm)
15
Layers
3
Layer Details
Sleep surface
A smooth surface with a soft knitted cloud pattern. It gives a gentle, cosy feel against sheets.
EcoMemory Fibres™
A layer of EcoMemory Fibres™ for cooling, cocooning comfort. This means a comfortable surface without the heat retention some children find with traditional memory foam.
Support system
Medium-firm Bonnell open-coil springs providing balanced full body support. The whole body is held evenly, which suits growing sleepers.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Made for raised frames: At 15cm deep, it stays below the guard rails on bunks, cabins and mid sleepers, where a standard-depth single can leave a child sitting dangerously high.
- Fits a busy child's room: A 90cm width leaves floor space free for a wardrobe, desk and toy storage in rooms where the bed is competing for every inch.
- Support that suits children: Medium-firm Bonnell open-coil springs hold a growing body evenly, which children generally need more than a soft, sinking surface.
- Cool, cocooning top layer: EcoMemory Fibres™ add comfort without the heat retention some children find with traditional memory foam, useful in a top bunk where warm air gathers.
- Works in shared rooms: Two of these singles plus a walkway fit where one larger bed and its clearance would not, at 3ft x 6ft 3in each.
This size suits you if...
You're buying for a child's bunk, cabin or mid sleeper and need a mattress slim enough to sit below the guard rail, you're fitting a bed into a compact children's room alongside storage and a desk, or you're setting up siblings with two singles and still need a walkway between them.
Consider another size if...
An adult will sleep on it most nights, or it's for a main bed. The 15cm depth and firmer springs are designed around children, and this mattress is only made in a UK single, so a heavier or taller sleeper should look at a standard-depth model instead.
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FAQ's
What size is the Silentnight Healthy Growth bunk mattress in a UK single?
It measures 90 x 190cm, or 3ft x 6ft 3in, the standard UK single footprint, with a slim 15cm depth. That depth is the point: it keeps a child safely below bunk and cabin bed guard rails. Any frame built for a standard UK single will take it.
How much floor space does a UK single bed need?
We suggest allowing at least 2.1m x 2.8m, which gives you room to walk alongside the bed and open drawers or a wardrobe. In a typical child's bedroom that still leaves space for a desk and toy storage, which is where the 90cm width of a single pays off.
Can I fit two UK singles in a shared children's room?
Often, yes. Each mattress is 90cm wide, so two singles side by side need less width than you might expect, though you'll want a clear walkway between them. If the room can't manage two beds on the floor, this mattress was designed for bunks, which stack the same two singles vertically.
Is a UK single long enough for a teenager?
At 190cm, the length suits most teenagers comfortably. Bear in mind, though, that this particular mattress is built for children, with a 15cm depth and firmer coil support. A tall or heavier teen may start to feel the springs, so treat it as a children's bed rather than one to carry into adulthood.
Will this mattress fit a cabin bed or mid sleeper frame?
Yes, provided the frame takes a standard UK single at 90 x 190cm. Cabin beds and mid sleepers usually specify a maximum mattress depth to keep the sleeper below the rail, and at 15cm this one sits comfortably under most limits. Check your frame's stated maximum before ordering to be sure.