Jay Be Simply Kids Pocket Sprung Anti Allergy Small Double Mattress
The Jay Be Simply Kids Pocket Sprung Anti Allergy Mattress is a pocket spring mattress for children, with springs that respond to your child's weight and position.
- Anti-allergy design for kids' rooms
- Pocket sprung support
- Fits EU single bed frames
£239
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Jay Be Simply Kids Pocket Sprung Anti Allergy Mattress
More available sizes
Mattress details
Mattress
Jay Be Simply Kids Pocket Sprung Anti Allergy Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Depth (cm)
Layers
2
Layer Details
Smart Fibre / e-Fibre comfort layers
Polyester comfort layers with an open cell structure that lets air move through the mattress. For your child, that means a breathable, rebounding surface that should help limit heat building up overnight.
Pocket spring interior
Deep e-Pocket springs, each sitting in its own pocket so it responds independently to the body's contours. This gives a supportive medium feel that follows your child's shape as they move and grow.
Layer details from mattressman.co.uk and hafrenfurnishers.co.uk product pages, October 2026.
Key benefits
- Room for a growing teenager: At 30cm wider than the UK single, it gives a teenager who has stopped fitting a single genuine space to spread out.
- Fits where a double won't: It's 15cm narrower than a UK double, which can be the difference between the door clearing and the bed dominating a box room.
- Pocket springs across a wider surface: The springs move independently, which means the mattress responds to a child's weight wherever they end up on the extra width.
- Anti allergy design at full teen size: The anti allergy construction carries through to the UK small double, sensible in a room where dust builds up around a bigger bed.
- Same length as a single: Both are 190cm long, so upgrading only changes the width and you won't lose any extra floor space at the foot of the bed.
This size suits you if...
Your child or teenager has outgrown a UK single but their bedroom can't take a full double, or you want a spare room mattress that handles the odd overnight guest without committing a small room to a 4ft 6in frame. It also suits a downsized home where the second bedroom is tighter than the one the old bed came from.
Consider another size if...
Your child is young or the room is genuinely small, and the extra width would go unused. The UK single would suit you better: it's 30cm narrower, the same length, and we suggest at least 2.1m x 2.8m for it.
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FAQ's
Is a small double too big for a child's room?
It depends on the room, not the child. We suggest allowing at least 2.4m x 2.8m of floor space for the UK small double, which leaves enough clearance to open the door and move around. If the room is tighter than that, the UK single, which is 30cm narrower, is the safer choice.
How much bigger is the small double than the single version of this mattress?
The UK small double is 30cm wider than the UK single, and the two are exactly the same length at 190cm. In practice that extra width is what lets a teenager stretch out or change position freely, while the footprint from headboard to foot stays identical.
What bedding fits the Jay Be Simply Kids mattress in a UK small double?
You'll need small double (4ft) fitted sheets, which are a standard UK size and easy to find, paired with a standard double duvet. Single bedding from an old bed won't stretch to fit, so budget for a fresh set when you size up.
Will the small double fit on a teenager's existing bed frame?
Only if the frame is a 4ft small double. This mattress measures 120 x 190cm, so it won't sit properly on a single frame, and it will leave a 15cm gap on a standard double. Measure the frame's internal dimensions before ordering rather than going by the size printed on the old mattress.
Can two people share the small double size of this mattress?
For the odd night, yes, which makes it a workable guest room option. It's designed as a children's mattress though, so we wouldn't suggest it for two adults sharing every night. For nightly couple use you'd want an adult mattress in a UK double or larger, which this model doesn't come in.