MattressNextDay Deluxe Memory Foam Mattress
Mattress
MattressNextDay Deluxe Memory Foam Mattress
Size
Firmness
Medium
Construction
Depth (cm)
25
Layers
2
Layer Details
- Memory Foam. Memory foam, originally designed by NASA, moulds to your body, which means your weight is spread evenly and pressure eases at your hips and shoulders. The brand describes the support as orthopaedic, meaning it aims to keep your spine in a comfortable position as the foam contours.
- Knitted Cover. A soft knitted cover sits on top, and it's breathable, which helps keep you at a more even temperature through the night. That matters with memory foam, which can otherwise feel a little warm.
Layer details from mattressnextday.co.uk product page, September 2026.
- Room for two without crowding the bedroom: At 135cm wide, this size leaves space in a typical UK bedroom for bedside tables on both sides, which a UK king often doesn't.
- Memory foam suits sharing: The foam absorbs movement rather than bouncing it across the bed, which means a restless partner disturbs you less within your 67.5cm each.
- Affordable memory foam in the most popular size: The UK double sits at the accessible end of the range, useful if you're furnishing a whole home and the budget is stretched thin.
- Easy to dress: Double sheets and 200 x 200cm duvets are sold everywhere at every price point, so replacing bedding never becomes a hunt.
- A sensible guest room choice: Visiting couples can share it comfortably, and the medium feel is a safe middle ground when you can't predict who'll be sleeping on it.
This size suits you if...
You share the bed every night and your room suits a bed that leaves walking space, you're kitting out a first flat or second bedroom where the mattress has to share the floor with a wardrobe and drawers, 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 want more personal space, since 67.5cm each is workable but snug. If your room allows at least 2.7m x 2.9m, we'd recommend the UK king instead, which gives 75cm each and an extra 10cm of length.
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.
Is the MattressNextDay Deluxe in a UK double big enough for a couple?
Yes, for most couples. A UK double gives 67.5cm of width each, and the memory foam helps by absorbing movement rather than transferring it. That said, if either of you is broad shouldered or a sprawler, the UK king gives 75cm each for two sharing, which is a noticeable difference night to night.
What room size do I need for a double memory foam mattress?
For a UK double we suggest a room of at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space on both sides and, in most rooms, bedside tables too. This is Mattress Unboxed guidance rather than the manufacturer's, so treat it as a sensible starting point.
Should I get the MattressNextDay Deluxe in a UK double or a UK king?
It usually comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, so it fits where a king would dominate. If you can allow at least 2.7m x 2.9m and want more personal space, size up. If bedside tables both sides matter more, stay with the UK double.
How big is the MattressNextDay Deluxe UK double in feet?
It measures 4ft 6in x 6ft 3in, or 135 x 190cm. That's the standard UK double footprint, so any double bed frame, divan base or bedding you already own will fit it without adjustment.
Is a UK double worth it over a small double for one person?
Often, yes. The UK double is 15cm wider than the UK small double at the same length, and solo sleepers who spread out, or share with a pet, tend to appreciate that extra width. If your room is tight, though, the UK small double needs less floor space: allow at least 2.4m x 2.8m for it.