Komfi Vitality Max Double 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
£388.20
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Komfi Vitality Max Mattress in a Box
More available sizes
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
- Room for two, without filling the room: At 4ft 6in x 6ft 3in, the UK double gives each of you 67.5cm, which means a shared bed that still leaves space to walk round it.
- Bedside tables still fit: We suggest at least 2.6m x 2.8m for a UK double, so many standard bedrooms can keep a small table on each side for both sleepers.
- Cooler top for two bodies: Two people generate more warmth than one, and the breathable top layer is designed to let air move, which may help if one of you runs hot.
- A middle feel you can agree on: The medium rating is a sensible meeting point when partners sleep differently, although a heavier partner who prefers firm support may find it a little soft.
- Bedding you can buy anywhere: Double sheets and a 200 x 200cm double duvet fit, which helps if you're kitting out a whole home and every purchase counts.
This size suits you if...
You share the bed with a partner and your bedroom is a typical size, so a bigger bed would squeeze out the furniture you need. It also suits a guest room where visiting couples stay, or a solo sleeper who wants space to spread out.
Consider another size if...
You both sleep restlessly or one of you is tall, and your room is larger than average. We'd recommend the UK king instead; allow at least 2.7m x 2.9m for it.
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FAQ's
Is the Komfi Vitality Max double big enough for two people?
For most couples, yes. The UK double gives you 67.5cm each, which is the traditional British shared width. If one of you sprawls, the UK king gives 7.5cm more each and is longer too, but it needs a bigger room.
What size bedroom do I need for a Komfi Vitality Max UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. At that size you can usually keep bedside tables on both sides and still open a wardrobe without shuffling sideways.
Komfi Vitality Max double or king: which should a couple choose?
The UK double is 15cm narrower and 10cm shorter than the UK king. Choose the UK double if your room is around the typical size; consider the UK king if you have at least 2.7m x 2.9m and want more personal space.
Komfi Vitality Max small double vs double for sharing?
The UK double is 15cm wider than the UK small double, with the same length. For two adults every night, that extra width makes a real difference. The UK small double suits tighter rooms, where we suggest at least 2.4m x 2.8m.
What sheets fit the Komfi Vitality Max in a UK double?
Standard double sheets and a 200 x 200cm double duvet fit. The mattress is 30cm deep, so check the fitted sheet's pocket depth before buying; shallow sheets can pull off the corners on a mattress of this depth.