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.
- Fits where other sizes won't: At 90cm wide it leaves floor space free in a child's room already competing with a wardrobe, desk and toy storage.
- Modest room requirement: We suggest allowing at least 2.1m x 2.8m of floor space, which most UK box rooms and loft conversions can manage.
- Pressure relief for one: The memory foam moulds to a single sleeper's shape, easing pressure at the hips and shoulders without a partner's movement to disturb things.
- Works for two beds in one room: The single footprint makes it practical where siblings share, or where a guest room needs two beds rather than one large one.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and they're the most widely stocked and affordable bedding of any size.
- Simple to move upstairs: A single foam mattress is far easier to carry up narrow staircases and into lofts than any sprung double.
This size suits you if...
You're buying for a child or teenager, kitting out a guest room or spare-room office, or you sleep alone and want to keep as much floor space as possible. It also suits student rooms and first flats where the frame is provided and only the mattress is yours to choose.
Consider another size if...
You're an adult who spreads out at night, or you sometimes share the bed. We'd recommend the UK double instead, which is 45cm wider and gives 67.5cm each for two sharing; allow at least 2.6m x 2.8m of floor space.
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Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Will the UK single MattressNextDay Deluxe fit a bunk or mid sleeper frame?
The 90 x 190cm footprint matches standard UK bunk and mid sleeper frames. The one thing to check is depth: at 25cm this mattress is deeper than many bunk beds allow, and the guardrail on a top bunk must still sit safely above the mattress surface. Measure your frame's maximum depth before ordering.
Is a UK single memory foam mattress big enough for an adult?
At 90cm wide and 190cm long it works well for most solo adults, and the foam spreads your weight evenly across that width. If you're notably tall, remember the UK single is 10cm shorter than the UK king. Restless sleepers who roam across the bed may prefer sizing up to the UK small double.
What room size do I need for a single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space, which is our own guidance rather than the manufacturer's. That leaves room to walk around and open drawers. In a loft conversion, the narrow 90cm width also makes it easier to tuck the bed under the slope where a double simply wouldn't sit.
Is the UK single MattressNextDay Deluxe good for a child or teenager?
Yes, with a caveat. The UK single is the standard children's bed size, and at 190cm long there's plenty of growing room through the teenage years. Across owner feedback the mattress can feel firmer than expected at first, and lighter children may notice that more, though a medium feel generally suits growing spines well.
Where can I buy the MattressNextDay Deluxe in a UK single?
Stock and pricing move around, so the most reliable answer is the live comparison table on this page, which is updated as retailers change their prices. Check the listing specifies the UK single, 90 x 190cm, because some retailers list all five sizes of this mattress on a single product page.