Sealy Tranquility Mattress
Mattress
Sealy Tranquility Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
Layers
Layer Details
- 90cm each for two sharers: With 90cm each for two people sharing, you can both stretch out fully without ever negotiating for space.
- Distance beats any comfort layer: On an extra firm surface with minimal sink, a fidgeting partner is mostly a proximity problem, and 180cm of width solves it better than foam ever could.
- Room for night-time visitors: A child padding in at 3am, or a large dog treating the bed as theirs, no longer forces anyone to the edge.
- Firm support across the full width: Sealy's AlignSupport spring system keeps the surface consistent edge to edge, which means the same solid feel wherever you end up sleeping.
- The largest standard UK size: The UK super king is 30cm wider than the UK king, and it is the biggest size stocked as standard, so bedding and bases remain easy to find.
This size suits you if...
You share every night and want the maximum mainstream size, you sleep next to someone genuinely restless and need distance rather than dampening, or your bed regularly hosts children or pets on top of two adults. You will also both need to like an extra firm feel, since there is no soft side to retreat to. Allow at least 3m x 2.9m of floor space, ideally more.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum, or the extra width would go unused. The UK king would suit you better: it is the same length, and we suggest at least 2.7m x 2.9m for it.
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Is the Sealy Tranquility super king a good choice for restless couples?
Yes, arguably the best size for it. An extra firm mattress transfers less bounce than a soft one to begin with, and 90cm each for two people sharing means most movement happens too far away to notice. If one of you tosses and turns, the width does more for the other person's sleep than any comfort layer.
What room size do I need for the Sealy Tranquility super king?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. That allows walking space on both sides and room for the door to swing. In a large master or a period property with generous proportions, a UK king can look undersized, and the super king fills the space properly.
Should I buy the Sealy Tranquility in a UK king or super king?
The UK super king is 30cm wider than the UK king, and the two are the same length. If children or pets join you at night, or one of you is a restless sleeper, that extra width is the whole point. If your room is under 3m x 2.9m, the UK king is the sensible call.
Is a super king wide enough to share with children?
It is the size we would point parents towards. At 180cm wide, two adults and a visiting child can all keep a reasonable share, which is rarely true of a UK double. One caveat with this model: the Tranquility is extra firm, so younger children used to a softer surface may notice the difference.
Where can I buy the Sealy Tranquility super king?
Compare the retailers listed on this page; the prices shown here are updated as retailers change them. Before ordering, measure your staircase and landing turns, because a 180 x 200cm sprung mattress is heavy and awkward to manoeuvre, and check the doorway of the room it is destined for.