MattressNextDay Luxury Support Foam Double Mattress
The MattressNextDay Luxury Support Foam Mattress is a medium firm, all-foam mattress at 20cm deep, made in the UK by an NBF-approved manufacturer.
- Medium-firm feel suits back sleepers
- Breathable cover lets heat escape
- 5-year guarantee
£279
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MattressNextDay Luxury Support Foam Mattress
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Mattress details
Mattress
MattressNextDay Luxury Support Foam Mattress
Size
Firmness
Medium Firm
Construction
Foam
Rolled
Memory Foam
Orthopaedic
Depth (cm)
20
Layers
2
Layer Details
Knitted Cover
A soft knitted cover that's breathable, which means heat can escape rather than build up around you. It helps keep you at an even temperature through the night.
Reflex Foam
Reflex foam conforms to the shape of your body, which means you get tailored support where you need it. It's designed to help your spinal alignment and posture, giving a comfortable, supportive night's sleep.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Fits the room most of us actually have: At 135 x 190cm, the UK double leaves space for wardrobes and drawers in a typical British bedroom where a UK king would start to dominate.
- Firm-leaning foam works for two: The medium firm reflex foam keeps its shape under two different body weights, which means neither of you rolls into a dip in the middle.
- Bedside tables on both sides: Allow at least 2.6m x 2.8m and most rooms will still take a table each side, which matters more than an extra inch of mattress.
- Boxed delivery suits awkward access: It arrives rolled and boxed, which makes a double far easier to get up the turning stairs of an older terrace or across a tight landing.
- Easy and cheap to dress: Double sheets and 200 x 200cm duvets are sold everywhere at every price, useful if you're kitting out a whole home on a spread budget.
This size suits you if...
You're a couple in a typical UK bedroom and want the standard shared size, you're furnishing a first flat or a whole house and need a sensible, widely stocked size that won't swallow the room, or you sleep alone and want space to spread out, perhaps with a dog or cat claiming a corner.
Consider another size if...
You and your partner both like room to sprawl, or one of you is restless; 67.5cm each is where elbows start to meet. If your room is at least 2.7m x 2.9m, we'd recommend the UK king instead, which gives 75cm each for two sharing.
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FAQ's
Is the UK double MattressNextDay Luxury Support Foam Mattress big enough for a couple?
For most couples, yes. You get 67.5cm each for two people sharing, and the medium firm reflex foam resists the roll-together softer foam can cause. If one of you is broad or a restless sleeper, the UK king gives 75cm each, so the UK double gives 7.5cm less each. It's a fair trade if your room is on the smaller side.
What size room do I need for this mattress in a UK double?
We suggest a minimum of 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space on both sides and, in most rooms, a bedside table each. If your bedroom is smaller than that, it may be worth measuring carefully before committing, or looking at the UK small double.
Will a boxed double mattress fit up narrow stairs?
This is one of the double's quieter advantages. The mattress arrives rolled and boxed, so instead of manoeuvring a rigid 135 x 190cm slab around a turning staircase in an older terrace or a tight new build landing, you carry a compact roll and open it in the bedroom. Just check the box will clear your tightest doorway.
Should I get the UK double or the UK king in this mattress?
Go by your room first. The UK double is 15cm narrower and 10cm shorter than the UK king, and we suggest at least 2.7m x 2.9m for the UK king. If you have that space and share every night, the extra width is genuinely useful. If you don't, a UK king that leaves no walking room is a worse buy than a well-placed UK double.
Is a double a good size for a guest room?
Yes, it's the sensible choice if visiting couples stay. A UK single only sleeps one, and the firmer, medium firm feel of this mattress suits occasional guests of different builds better than a soft mattress one visitor loves and another hates. Bedding is easy too: standard double sheets and a 200 x 200cm duvet, stocked everywhere.