Tuft & Springs Serenity 5000 Mattress
Mattress
Tuft & Springs Serenity 5000 Mattress
Size
Firmness
Construction
Depth (cm)
38
Layers
2
Layer Details
- Pillow Top. A plush stitched-in pillow top filled with wool, cotton and cashmere, which means a soft, cushioned surface without needing a separate topper. The natural fibres also help regulate temperature, useful if you tend to sleep warm.
- Pocket Springs. Up to 5,000 pocket springs that move independently of one another, which means support is targeted to your pressure points rather than spread evenly. It also helps limit motion transfer, so a restless partner is less likely to wake you.
Layer details from mattressnextday.co.uk product page, September 2026.
- A single's width each: At 90cm each for two sharing, you each get the width of a UK single, which means nobody gets pushed to the edge when a small child climbs in.
- Distance from a restless partner: The pocket springs limit how far movement travels, and the extra width puts real distance between you, so a partner who fidgets all night is far less likely to wake you.
- 15cm more each than a UK king: On the same length as the UK king, you gain 15cm each, a small figure on paper that you notice quickly once elbows and knees come into it.
- Right scale for a large room: In a period property or a big master bedroom, a 6ft wide mattress with a tall 38cm pillow top fills the space properly rather than looking lost against the walls.
- Room for a large dog: If a big dog sleeps on the bed every night, the extra width lets it settle along one side without pinning anyone's legs.
This size suits you if...
You share with a restless partner or often find children and a dog in the bed by morning, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is under 3m x 2.9m, or your doorways and landing turns are tight. We'd recommend the UK king instead, which is 30cm narrower and needs at least 2.7m x 2.9m.
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How much room per person does the Serenity 5000 UK super king give?
Two people sharing get 90cm each on a 180 x 200cm surface, or 6ft x 6ft 6in if you think in feet. That matches the width of a UK single per person, so each of you has a full single's worth of room before any children or pets arrive.
Serenity 5000 super king vs king: is the extra width noticeable?
The UK super king is 30cm wider than the UK king and the same length, giving 15cm more each than the 75cm per person on a UK king. You feel it most if one of you sprawls or a child regularly joins you. If neither applies, the UK king may be plenty.
Is the Serenity 5000 super king good for a restless partner?
It helps in two ways. The pocket springs move independently, so a partner turning over is less likely to jolt your side, and 90cm each puts more physical distance between you. For a genuinely unsettled sleeper, that distance does more than any comfort layer could.
Will the Serenity 5000 UK super king fit in a loft conversion bedroom?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. In a loft conversion the sloping ceiling usually decides which wall the bed goes against, so measure the full-height floor area rather than the whole room. Check the stair turns and landing too, as the mattress is 38cm deep.
Can a family with young children share a Serenity 5000 super king?
For the occasional night-time visit, yes. With 180cm of width, a small child can lie between two adults without anyone ending up on the edge. If you plan to co-sleep every night, follow current safe sleep guidance for your child's age before deciding how the bed is shared.