MattressNextDay Kingfisher Waterproof Contract King Size 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
£199
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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
- Room for two to share: At 150cm wide the UK king gives 75cm each for two people sharing, which means fewer elbows and less disturbance when one of you shifts or gets up early.
- Extra length for taller guests: The 200cm length is 10cm longer than the UK double, a genuine relief if anyone using the bed is approaching six foot.
- Accidents wipe away, even at this size: The waterproof cover means spills on a big shared bed clean off rather than soaking in, useful when children or pets end up on it.
- The largest Kingfisher made: The Kingfisher tops out at the UK king, so this is the size to pick when you need the most space it can offer.
- Recycled EcoFoam® core: The medium firm EcoFoam® layer is made from 100% recycled foam, so a bigger mattress here still carries a smaller carbon footprint than new foam would.
This size suits you if...
You're furnishing a rental, guest room or care setting and need the biggest wipe-clean mattress the Kingfisher offers, you regularly host couples or taller guests who'd feel cramped on a UK double, or you want a hard-wearing spare bed that copes with children and the dog climbing on without you worrying about spills.
Consider another size if...
Your room is under our suggested 2.7m x 2.9m minimum, or the bed is mainly for one occasional guest. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m, or the UK single for solo use.
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FAQ's
What are the dimensions of the Kingfisher mattress in a UK king?
The UK king measures 150 x 200cm, which is 5ft x 6ft 6in. That makes it 15cm wider and 10cm longer than the UK double, and it's the largest size the Kingfisher is made in.
Is the UK king Kingfisher big enough for two adults?
On width, yes: two people sharing get 75cm each, comfortably more than the UK double's 67.5cm each. The caveat is depth. At 10cm this is a slim contract mattress, so it suits couples as an occasional or guest bed rather than heavier adults sleeping on it every night.
What room size do I need for a king size Kingfisher?
We suggest a room of at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable once wardrobes and drawers are in. New build master bedrooms can be tighter than they look, so measure with the furniture in mind before committing.
Does the Kingfisher come in anything bigger than a UK king?
No. The UK king is the top of the Kingfisher's range, so there's no super king option. If you need 180cm of width you'll have to look at a different mattress; within this model, the UK king is as roomy as it gets.
Where can I buy the Kingfisher waterproof mattress in a UK king?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so what you see reflects current availability for the UK king rather than a snapshot from weeks ago.