Komfi Vitality Max Super King Mattress in a Box
The Komfi Vitality Max Mattress in a Box has a Maxcool breathable top layer built to move air and regulate temperature, which means you should find it easier to stay comfortable if you tend to overheat.
- Cooling layer helps you sleep cooler
- Medium feel suits most sleepers
- Removable cover that washes easily
£533.21
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Komfi Vitality Max Mattress in a Box
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Mattress details
Mattress
Komfi Vitality Max Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Rolled
Depth (cm)
30
Layers
3
Layer Details
Next Gen 4G Maxcool Layer
A breathable layer engineered to maximise airflow and regulate body temperature. It should help you avoid overheating through the night.
Ultra Soft Touch Layer
A cushioned layer that supports comfort and spinal alignment. It adds a softer feel under you without losing support.
Responsive Support Layer
A base layer that provides balanced support and maintains body positioning. It keeps you held evenly and stops the softer layers above from sinking too far.
Layer details from bedsonlegs.co.uk product page, October 2026.
Key benefits
- 90cm each when you share: Each of you gets 90cm of width, so a partner who turns over or throws the duvet off is far less likely to end up on your side.
- Space when the bed fills up: If a small child climbs in at night or a large dog sleeps at the foot, the extra width still leaves both adults a proper share.
- 15cm more each than a UK king: Each sleeper gains 15cm over the UK king at the same 200cm length, so all the extra goes into width, where couples usually feel cramped.
- In proportion in a large bedroom: In a period property or a generous master bedroom, a UK super king fills the wall comfortably, where a UK king can look slightly undersized.
- Easier on stairs and landings: It comes vacuum packed and rolled, which makes getting a 180cm-wide mattress round a tight landing turn far simpler than carrying a flat one.
This size suits you if...
You share the bed with a restless partner and want as much distance as possible, or your children or dog join you most nights, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or two of you rarely need more than a little extra room. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
What room size do I need for a Komfi Vitality Max UK super king?
We suggest at least 3m x 2.9m, although around 3.5m x 3.2m feels more comfortable once you add bedside tables and space to walk round. Before buying, check that the door can still swing fully open and that wardrobe doors clear the side of the bed.
Komfi Vitality Max UK super king or UK king: which should I choose?
The UK super king is 30cm wider than the UK king but the same length, giving each of you 15cm more. If space between you matters most, the UK super king is the better pick. If your room is tighter, the UK king needs at least 2.7m x 2.9m rather than 3m x 2.9m.
How much space does each person get on a super king compared with a double?
Two people sharing a UK super king get 90cm each. On a UK double, that drops to 67.5cm each, so the UK super king gives you 22.5cm more per person. For a restless sleeper, that is a noticeable difference in how often you disturb each other.
What size duvet and sheets fit a Komfi Vitality Max super king?
You'll need super king fitted sheets and a 260 x 220cm duvet. Bedding at this size usually costs a little more than for a UK king, so factor it into your budget. The mattress is 30cm deep, so check that the fitted sheet's pocket depth suits it before buying.
Can I get a UK super king mattress in a box up narrow stairs?
Yes, it arrives vacuum packed and rolled, so it is much easier on stairs and landing turns than a flat mattress. Once you unroll it, though, it is 180cm wide, so open it in the bedroom itself.