MattressNextDay Kingfisher Waterproof Contract Small Double Mattress
The Kingfisher is a waterproof contract mattress from MattressNextDay, built around a single 10cm layer of EcoFoam®, a recycled foam that offers a medium firm feel.
- Waterproof cover wipes clean
- Made from 100% recycled foam
- 5-year guarantee
£149
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MattressNextDay Kingfisher Waterproof Contract Mattress
More available sizes
Mattress details
Mattress
MattressNextDay Kingfisher Waterproof Contract Mattress
Size
Firmness
Medium Firm
Construction
Foam
Open Coil Spring
Depth (cm)
10
Layers
Layer Details
EcoFoam®
A core made from 100% recycled and re-engineered foam, which means a greener product with a reduced carbon footprint. It's resilient, durable and naturally dust mite resistant, giving solid body support with a medium firm feel.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Extra width for one: At 120cm across, the UK small double is 30cm wider than the UK single, so a teenager or solo adult can properly stretch out.
- Fits compact rooms: It's 15cm narrower than the UK double, which can be the difference between a door that clears and one that doesn't in a box room or studio.
- Practical for guest use: Two people can share for the occasional night, and the waterproof cover means a spilt cup of tea wipes away rather than soaking in.
- Suits rental turnarounds: In a holiday let's small second bedroom, this size sleeps one comfortably or a couple at a pinch, and the hypoallergenic materials help between guests.
- Easy to kit out: 4ft is a standard UK size, so small double fitted sheets and frames are straightforward to find, paired with a standard double duvet.
This size suits you if...
You're furnishing a rental, guest room or child's room where accidents happen and the bed sleeps one most nights. Or your teenager has outgrown a single but the room can't spare the floor space a full double takes. It also suits a loft or box room where the UK small double's 120cm width fits and a wider bed simply wouldn't.
Consider another size if...
You have a couple sharing this bed regularly, or the room can comfortably take a wider bed. We'd recommend the UK double instead: it gives 67.5cm each for two sharing, and we suggest a room of at least 2.6m x 2.8m.
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FAQ's
Is a small double big enough for a teenager?
Yes, generously so. The UK small double is 30cm wider than the UK single at the same 190cm length, so a growing teenager gets real room to spread out. Given the Kingfisher's waterproof cover and medium firm feel, it's a sensible step up that still leaves floor space in a smaller bedroom.
Can two adults sleep on the Kingfisher small double?
For the odd night, yes, which makes it a reasonable guest room choice. For every night, it's a squeeze: the UK small double is 15cm narrower than the UK double. Bear in mind the Kingfisher is a slim 10cm contract mattress, so it suits occasional guests better than a couple's main bed in any size.
What room size do I need for a small double mattress?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves enough space to walk round the bed and open the door. If your room is tighter than that, the UK single may work better, and for that size we suggest at least 2.1m x 2.8m.
Where can I buy the Kingfisher in a UK small double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you buy rather than assuming yesterday's price still stands.
What bedding fits the Kingfisher small double?
You'll need small double (4ft) fitted sheets, and a standard double duvet works well on top. Because the Kingfisher is only 10cm deep, standard-depth fitted sheets will tuck under easily, with no need for extra-deep versions. A waterproof-friendly protector isn't essential here since the cover itself wipes clean.