Jay-Be Sleep Smart e-Sprung Childrens Bunk Single Mattress
The Jay-Be Sleep Smart e-Sprung is a children's mattress built with bunk beds in mind.
- Sits below the bunk safety rail
- Medium-firm support, no sinking in
- Hypoallergenic, handcrafted in the UK
£125
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Jay-Be Sleep Smart e-Sprung Childrens Bunk Mattress
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Mattress details
Mattress
Jay-Be Sleep Smart e-Sprung Childrens Bunk Mattress
Size
Firmness
Medium Firm
Construction
Open Coil Spring
Depth (cm)
16
Layers
4
Layer Details
Cover
A knitted cover with a soft finish that adds cosiness and warmth. It's designed to enhance airflow and breathability, so it shouldn't trap heat around a sleeping child.
Comfort Layer
Soft white fibre fillings create a cosy feel directly under the cover. They're durable and resilient, which means the mattress should hold its shape rather than flattening quickly.
Support Layer
An e-Fibre base and support layer that work together to create full body support. This sits between the comfort fillings and the springs to keep the feel consistent.
Core
Traditional open coil springs, interlaced and joined in a lattice design. That lattice distributes weight evenly across the surface, which suits lighter bodies well.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Sized for bunks and raised frames: The UK single is the standard bunk and mid sleeper size, and the 16cm depth keeps the sleeping surface safely below a top bunk's guard rail.
- A compact footprint for small rooms: At 90cm wide, we suggest allowing just 2.1m x 2.8m of floor space, so it fits a boxroom or a bed tucked under a loft slope.
- Works in pairs for shared rooms: Two UK singles plus a walkway is the classic sibling setup, and the slim depth keeps a bunk conversion simple later on.
- Support suited to lighter bodies: The interlaced open coil lattice spreads a child's weight evenly across the 90cm surface, which means consistent support edge to edge rather than a soft middle.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and they're the most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child's bunk, cabin bed or mid sleeper and need a mattress shallow enough to keep the guard rail effective, you're fitting two beds into a shared siblings' room and every centimetre of walkway counts, or you want a sensibly priced UK single for a growing child rather than a long-term adult bed.
Consider another size if...
You need this mattress in anything other than a UK single, or you're buying for an adult or heavier teenager. It only comes in this one size, and the build is designed for lighter, growing bodies.
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FAQ's
What are the dimensions of the Jay-Be Sleep Smart e-Sprung UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK single, so it fits standard single bed frames, bunks and mid sleepers without gaps at the edges, and standard single bedding fits it too.
How much room do I need for the UK single Jay-Be bunk mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves enough room to walk round the bed and open drawers, though a bunk or mid sleeper frame frees up even more floor for storage underneath.
Will two Jay-Be Sleep Smart e-Sprung singles fit in a shared kids' room?
Often, yes. Each UK single is 90cm wide, so two beds plus a walkway between them is workable in most shared bedrooms. If the room is tight, the 16cm depth means this mattress also suits stacking the beds as a bunk instead.
Is a UK single big enough for a teenager on this mattress?
The 90 x 190cm surface suits most children and younger teens comfortably. The bigger limit here is the build rather than the size: JAY-BE designed this mattress for children, so heavier teenagers may need something with deeper support layers.
Does the Jay-Be Sleep Smart e-Sprung UK single fit a cabin bed as well as a bunk?
Yes. Cabin beds and mid sleepers take a standard UK single, and the slim 16cm profile that keeps a top bunk's guard rail effective also stops the mattress sitting too proud on a raised cabin frame.