Silentnight Healthy Growth Eco Bunk Single Mattress
The Silentnight Healthy Growth Eco Bunk Mattress is a firm single mattress designed with bunk beds in mind.
- 15cm depth suits bunk & cabin beds
- Firm, consistent support for kids
- 60-night trial & 5-year guarantee
£169
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Silentnight Healthy Growth Eco Bunk Mattress
More available sizes
Mattress details
Mattress
Silentnight Healthy Growth Eco Bunk Mattress
Size
Firmness
Firm
Construction
Open Coil Spring
Eco-Friendly
Depth (cm)
15
Layers
3
Layer Details
Sleep surface
A smooth sleep surface with a soft knitted cloud pattern and a lush green border. It's a child-friendly finish rather than a functional layer, but the knit keeps the top gentle against skin.
Comfort layer
Breathable EcoComfort Fibres sit beneath the surface, which means air can move through the comfort layer rather than trapping warmth. That's helpful for children, who often run hot at night.
Support system
An open coil traditional spring support system with interconnected springs. The springs move together as one unit, giving an even, firm base across the whole mattress.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Made for raised frames: The 15cm depth sits low on a bunk or mid sleeper, which means the safety rail still does its job rather than being swallowed by a thick mattress.
- Fits the smallest bedrooms: At 3ft wide, a UK single leaves floor space for a desk, wardrobe and toy storage in a room where every centimetre is contested.
- Works for siblings sharing: Two UK singles plus a walkway fit where larger sizes simply wouldn't, and the firm open coil support suits lightweight children on both beds.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked and least expensive bedding of any UK size.
- Breathable for warm sleepers: The EcoComfort Fibre comfort layer lets air move through rather than trapping heat, useful for children, who tend to run warm at night.
This size suits you if...
You're buying for a bunk bed, cabin bed or mid sleeper and need a mattress slim enough to keep the guard rail effective, or you're furnishing a compact child's bedroom where a 90cm-wide bed leaves room for everything else, or you have siblings sharing and need two beds plus space to walk between them.
Consider another size if...
Your sleeper is an adult or heavier teenager, or you need any size other than a UK single. This mattress comes in one size only, and its slim, firm build is designed for children rather than grown-up bodies.
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FAQ's
Will the Silentnight Healthy Growth Eco Bunk Mattress fit a standard UK single bunk bed?
Yes. It measures 90 x 190cm, the standard UK single, so it fits standard bunk, cabin and mid-sleeper frames. Just as importantly, its 15cm depth keeps a child sitting below the guard rail. A standard-depth mattress can lift a sleeper above the rail, which is the problem bunk-specific mattresses exist to solve.
What room size do I need for this UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves enough room to make the bed and move around it. In practice the single is the easiest size to place: even a small child's room or a loft conversion with a narrow footprint usually accommodates one comfortably.
Can two of these UK singles work in a shared children's room?
Often, yes. At 90cm wide each, two UK singles plus a walkway between them fit in rooms where a larger bed would dominate. The firm open coil support suits lightweight children well, and the slim profile means the beds sit low, which many parents prefer for younger sleepers.
Does the Silentnight Healthy Growth Eco Bunk Mattress come in a double or king?
No. It's made in the UK single only, because it's designed around bunk and raised frames, which are almost always single-width. If you need a UK double or UK king, you'll be looking at a different mattress, and a standard-depth one would suit an adult bed better anyway.
What bedding fits the Silentnight Healthy Growth Eco Bunk Mattress?
Standard UK single bedding fits: single fitted sheets and a 135 x 200cm single duvet. The slim 15cm depth means most fitted sheets will tuck under generously rather than straining at the corners. Single bedding is also the cheapest and most widely available of any size, handy when children's bedding needs frequent washing.