Silentnight Healthy Growth Eco Waterproof Bunk Mattress
Mattress
Silentnight Healthy Growth Eco Waterproof Bunk Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
15
Layers
3
Layer Details
- Sleep surface. One side is smooth and waterproof, which means spills and night-time accidents wipe away rather than sinking in. Flip it over and there's a softer sleep surface for when your child no longer needs the protection.
- Comfort layer. Breathable EcoComfort Fibres™ let air move through the mattress, which means less overheating for a warm sleeper. They're also part of what makes this mattress hypoallergenic.
- Support system. A medium/firm Bonnell open-coil spring system with interconnected springs sits at the core. It gives balanced, consistent support across the whole surface, well suited to a growing child.
Layer details from silentnight.co.uk product page, September 2026.
- Made for raised frames: At 15cm deep, it sits low enough within bunk and mid-sleeper guard rails, which is a genuine safety point rather than a nice-to-have.
- Fits the smallest children's rooms: A 90cm-wide bed leaves floor space for a desk, wardrobe and toy storage; allow at least 2.1m x 2.8m and you'll still have room to move.
- Works for siblings sharing: Two UK singles plus a walkway fit in most shared children's rooms, and the interconnected springs matter little when each child has their own bed.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, the most widely stocked and affordable bedding of any UK size.
- Waterproof side up while it's needed: The wipe-clean surface handles accidents on a top bunk, where changing soaked bedding is genuinely awkward, then flips to the softer side later.
This size suits you if...
You're buying for a child's bunk bed, cabin bed or mid sleeper, where the 15cm depth keeps the mattress safely below the guard rail. It also suits a child's first big bed in a compact room, or siblings sharing where two beds and a walkway have to fit. If the frame came with the house move or the hand-me-down and the mattress didn't, this is the standard size to fill it.
Consider another size if...
You're shopping for an adult or a teenager who's nearly outgrown a children's mattress. This model only comes in a UK single and is designed for children, so a standard-depth adult single would suit better than this.
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Will the Silentnight Healthy Growth bunk mattress fit a standard UK single bed frame?
Yes. At 90 x 190cm it's a standard UK single, so it fits ordinary single frames as well as bunks, cabin beds and mid sleepers. On a normal frame it will sit lower than you might expect, since at 15cm it's slimmer than a typical adult mattress, though for a child that's rarely a problem.
How much room do I need for a single bunk mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. Bunk beds are a good fit for tighter rooms because two children sleep on one footprint, so a shared room with toy storage and a desk can still work. Check ceiling height for the top bunk separately, as that depends on your frame.
What bedding fits the UK single version of this mattress?
Standard UK single fitted sheets and a single duvet, which measures 135 x 200cm. Because the mattress is only 15cm deep, standard-depth fitted sheets will fit easily, and you may find deep-fitted sheets a little baggy. Single bedding is the cheapest and most widely stocked of any UK size, which helps during the accident-prone years when spares are useful.
Is a UK single big enough for a teenager?
At 90 x 190cm, a UK single suits most children and teens comfortably. This particular mattress is designed for children, though, with a slim 15cm profile and a waterproof surface, so an older teenager may be better served by a standard-depth single mattress even though the size itself would still fit them.
Where can I buy the Silentnight Healthy Growth bunk mattress in a UK single?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so it's worth checking back before you buy. Since the UK single is the only size this mattress comes in, you won't need to weigh up sizing options, just pick the retailer that suits you.