Jay Be Simply Kids Waterproof Anti-Microbial Foam Free Sprung Single Mattress
The Jay Be Simply Kids is a foam-free sprung mattress designed for children, with a waterproof cover that carries anti-bacterial, anti-microbial and anti-fungal protection, which means accidents and spills wipe away rather than soaking in.
- Waterproof fabric handles spills
- Breathable fibres keep it fresh
- 5-year guarantee
£145.92
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Jay Be Simply Kids Waterproof Anti-Microbial Foam Free Sprung Mattress
More available sizes
Mattress details
Mattress
Jay Be Simply Kids Waterproof Anti-Microbial Foam Free Sprung Mattress
Size
Firmness
Medium
Construction
Foam
Open Coil Spring
Depth (cm)
Layers
4
Layer Details
Waterproof fabric
A waterproof outer fabric with anti-bacterial, anti-microbial and anti-fungal protection, which means spills and accidents stay on the surface rather than reaching the layers below. That makes it far easier to keep hygienic through the messier years.
Comfort layers
Entirely foam-free, using breathable e-Fibre comfort layers with open-cell fibres that help wick away moisture. In practice, that means a cooler, fresher sleeping surface for your child.
Spring core
A medium firmness spring core that provides evenly distributed support across the mattress. This is a sensible feel for growing children, neither too soft nor too hard.
3D Mesh border
A 3D mesh border vent around the side of the mattress increases airflow. Combined with the breathable comfort layers, it helps the mattress stay ventilated.
Layer details from jaybe.com product page, September 2026.
Key benefits
- Built for kids' frames: At 90 x 190cm it matches the standard UK single footprint, so it should drop into most children's bedsteads, bunks and mid sleepers without fuss.
- Space left over for everything else: A child's room has to hold a wardrobe, a desk and the toy pile too, and at 3ft wide this size leaves the floor mostly free.
- Accidents stay on the surface: The waterproof, anti-microbial cover means a wet night in a small bed is a sheet change, which matters most at the age a UK single suits.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any UK size.
- Works two to a room: Siblings sharing can fit two UK singles plus a walkway in rooms where anything wider would leave no space to move.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares the floor with a desk and storage, you need a mattress to fit a standard single bunk, cabin or mid-sleeper frame, or you have two children sharing and need two beds with room to walk between them.
Consider another size if...
Your child is older or bigger and 90cm of width already feels cramped. The UK small double is 30cm wider at the same length, and we'd recommend it instead if you can allow at least 2.4m x 2.8m of floor space.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
What size is the Jay Be Simply Kids mattress in a UK single?
The UK single measures 90 x 190cm, or 3ft x 6ft 3in. That's the standard one-person size in the UK, so it matches almost every single bedstead, divan, bunk and mid sleeper sold here, and standard single bedding fits it.
Will the UK single Jay Be Simply Kids fit a bunk bed or mid sleeper?
The footprint will: bunks and mid sleepers in the UK are built around the 90 x 190cm single. The thing to check is depth, since raised frames set a maximum mattress height so the guard rail still does its job. Jay Be doesn't publish a depth in the details we have, so check the brand's guidance against your frame before buying.
How much floor space does a UK single need in a child's room?
We suggest at least 2.1m x 2.8m. That leaves enough room to make the bed and walk around it, with space spare for a wardrobe or desk in most children's rooms. For siblings sharing, two UK singles will fit in rooms where a wider bed would swallow the floor.
Is the UK single big enough for a teenager?
For most teens, yes: at 90 x 190cm it's the size the majority of UK teenagers sleep on. Bear in mind this particular mattress is designed for children, so a heavier older teenager wanting a long-term bed may be better served by an adult mattress rather than a bigger size of this one.
Should I choose the UK single or the UK small double for this mattress?
The UK single is 30cm narrower than the UK small double, and the two are the same length. For most children the UK single is plenty, and it keeps floor space free. If your child is older and sprawls, and the room offers at least 2.4m x 2.8m, the UK small double gives welcome extra width.