Jay Be Simply Kids Anti-Allergy Foam Free Sprung Small Double Mattress
The Jay Be Simply Kids Anti-Allergy Foam Free Sprung Mattress is a children's mattress that, as the name suggests, uses springs rather than foam and comes with anti-allergy credentials.
- Anti-allergy design for kids
- Foam-free sprung construction
- Fits EU single bed frames
£199
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 Anti-Allergy Foam Free Sprung Mattress
More available sizes
Mattress details
Mattress
Jay Be Simply Kids Anti-Allergy Foam Free Sprung Mattress
Size
Firmness
Medium Firm
Construction
Foam
Depth (cm)
Layers
4
Layer Details
Woven top surface
The top is a soft woven fabric treated with Purotex, the anti-allergy treatment. It gives your child a soft surface to lie on, and suits families who want an allergy-conscious cover.
Rebound e-Fibre comfort layer
E-Fibre fillings sit under the cover and add comfort, moisture control and temperature control. This is a foam-free layer, so the cushioning comes from fibre rather than foam.
High-density eco e-Fibre insulator
This eco e-Fibre insulator works alongside the comfort fillings so your child doesn't feel the springs through the mattress. It keeps the medium-firm sprung feel from being uncomfortable on top.
Spring unit
The springs give a supportive sleeping surface, and a cushioned border surrounds them. Together they give the medium-firm support a growing child needs, though no spring count is published.
Layer details from mattressman.co.uk and betterbedcompany.co.uk product pages, October 2026.
Key benefits
- Room to grow without a bigger footprint: At 30cm wider than the UK single, it gives a growing child or teenager real spreading room while staying a manageable size for a smaller bedroom.
- Same length as a single: The UK small double and the UK single are the same length, so upgrading the width doesn't push the bed further into the room.
- Fits box rooms a double would crowd: In a box room or loft bedroom, this 120cm width often decides whether the door still clears and a wardrobe still fits.
- Anti-allergy design at a sensible size: The foam-free sprung, anti-allergy construction carries into the UK small double, so allergy-prone children get the same benefits with more space to move.
- Standard 4ft bedding and frames: The 4ft small double is a standard UK size, which means fitted sheets and replacement frames are easy to find as your child grows.
This size suits you if...
Your child or teenager has outgrown a UK single and wants proper space to stretch out, or you're furnishing a small second bedroom where a standard double would dominate the floor. It also suits a rental or holiday let with a compact kids' room, where a slightly wider bed feels more generous without cramping the space. Allow at least 2.4m x 2.8m of room for this size.
Consider another size if...
Your child's bedroom is under our suggested 2.4m x 2.8m minimum, or the current single frame is staying put. In that case we'd recommend the UK single instead, which needs a room of at least 2.1m x 2.8m.
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
Is the UK small double Jay Be Simply Kids mattress big enough for a teenager?
Yes, and it's arguably the size where this mattress makes most sense. At 120 x 190cm it's 30cm wider than the UK single, which gives a teenager genuine room to spread out, while the anti-allergy sprung design stays the same. Bear in mind it remains a children's mattress, so it's a stopgap rather than a first adult bed.
What room size do I need for the Jay Be Simply Kids mattress in a small double?
We suggest a room of at least 2.4m x 2.8m for the UK small double. That allows space to walk around the bed and open drawers or a wardrobe. If the room falls short of that, the UK single needs at least 2.1m x 2.8m and would be the safer fit.
Can an adult sleep on the Jay Be Simply Kids small double mattress?
For the odd night in a guest room it will do, but this mattress is designed for children, and the small double size doesn't change that. If you want a 4ft mattress for regular adult use, a mattress built for adult body weights would serve you better than sizing this one up.
How much bigger is the small double than the single in this mattress?
The UK small double is 30cm wider than the UK single, and the two are exactly the same length at 190cm. So the upgrade buys width only: more room to sprawl sideways, with no extra length to squeeze into the room. That's usually the right trade for a child who has started to feel hemmed in.
Where can I buy the Jay Be Simply Kids mattress in a UK small double?
Stock moves around, so the most reliable answer is the live comparison table on this page, which shows current retailers and prices for the UK small double specifically and is updated as retailers change their listings. Sizes can go in and out of stock independently, so a retailer carrying the UK single won't always have this one.