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.
- 75cm each for two sharing: Two people get 75cm apiece, which means you can change position without negotiating for space with your partner.
- Less disturbance from a restless partner: Memory foam absorbs movement rather than transferring it, so an early alarm or a 2am toilet trip on one side is less likely to wake the other.
- Extra length for taller sleepers: At 200cm long, the UK king adds 10cm over a UK double, a real relief if one of you is approaching six foot.
- Pressure relief across a wider surface: The foam moulds to each sleeper's shape independently, which means your hips and shoulders get cradled even if your partner weighs considerably more or less than you.
- Medium feel that suits most couples: A medium firmness is a sensible compromise when two people with different preferences share one mattress, although lighter side sleepers may find it slightly firm at first.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, one of you keeps different hours and you want their movement to reach you less, or someone in the bed is tall enough that a 190cm mattress leaves their feet at the edge.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and still sleeps two comfortably.
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Is the MattressNextDay Deluxe in a UK king good for couples?
It's a strong fit. The UK king gives 75cm per person, 7.5cm more each than a UK double, and memory foam absorbs movement, so you feel less of your partner turning over. The medium feel suits a broad range of sharers, although anyone wanting a plush, sink-in surface may find it firmer than expected.
Will a UK king memory foam mattress fit my bedroom?
We suggest allowing at least 2.7m x 2.9m of floor space for a UK king, which leaves room to walk around the bed and open drawers. Measure with wardrobes and bedside tables in place: a new build master bedroom can feel a lot smaller once the furniture is in.
Is a UK king long enough for someone over six foot?
At 200cm (5ft x 6ft 6in overall), the UK king is 10cm longer than a UK double, so a sleeper a little over six foot fits without their feet hanging off the end. For many taller buyers the length, rather than the width, is the real reason to size up.
Does a king size help if my partner gets up earlier than me?
Yes, on two counts. The 150cm width puts more distance between you, and this mattress's memory foam absorbs movement rather than bouncing it across the bed, so someone slipping out hours before your alarm is less likely to wake you than on a sprung mattress.
Should I choose the UK king or the UK super king?
The UK super king is 30cm wider, giving 90cm each rather than 75cm, and the two are the same length. If a dog routinely joins you, or you both sprawl, that extra width earns consideration, but it needs at least 3m x 2.9m of room. For most couples the UK king is space enough.