Komfi Vitality Excel Super King Mattress in a Box
The Komfi Vitality Excel Mattress in a Box has four foam layers over a firm Responsive Support Core, which means you get push-back support under your shoulders, hips and lower back without any springs.
- Firm feel with push-back support
- Memory foam eases tension at hips
- Washable cover for easy care
£414.09
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Komfi Vitality Excel Mattress in a Box
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Mattress details
Mattress
Komfi Vitality Excel Mattress in a Box
Size
Firmness
Construction
Eco-Friendly
Foam
Memory Foam
Rolled
Depth (cm)
25
Layers
4
Layer Details
Neufoam memory foam comfort layer
A memory foam layer set below the outer cover that adapts to your body's shape. That eases tension around your joints and hips.
Breathable high-density foam layer
A high-density foam that promotes airflow. It helps keep the sleeping surface fresh and temperature-regulated.
Responsive Support Core
A firm foam layer that cushions pressure points like shoulders, hips and lower back. It keeps push-back support so you don't sink too far.
Ecofoam foundation
A high-density base made from 100% recycled foam offcuts. It gives the mattress a stable footing while reducing its carbon impact.
Layer details from komfi.com product page, October 2026.
Key benefits
- 90cm of your own: Each sleeper gets 90cm, the full width of a UK single, which means a restless partner turning over is far less likely to land in your space.
- Room for small visitors: When a child wanders in at 3am, the UK super king leaves enough width that nobody ends up clinging to the edge.
- Firm support across the width: The firm Responsive Support Core pushes back evenly, so the middle section where children or dogs settle doesn't feel like a dip between two sleepers.
- Proportioned for bigger rooms: In a period property or a generous master bedroom, a UK king can look a little lost, while the UK super king fills the wall properly.
- Extra width over a UK king: Moving up from a UK king adds 30cm of width and 15cm more each for two sharing, with no change in length.
This size suits you if...
You share with a partner who tosses and turns, and distance is the only thing that has ever helped. It also suits you if children or a large dog join you most nights and you want everyone to still have a fair share, and your room clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom falls short of 3m x 2.9m, or a sloping loft ceiling leaves only a narrow wall for the headboard. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
What size bedroom do I need for a Komfi Vitality Excel super king?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable once bedside tables and a wardrobe are in. In a loft conversion, measure the floor where you have full standing height, because the slope usually decides which wall the bed takes and the usable area can be smaller than the floor plan suggests.
Is a super king worth it over a king for a restless partner?
For many couples, yes. The UK super king gives 15cm more each than the UK king and is 30cm wider in total, at the same 200cm length. A firm foam surface like this one helps, but extra distance is what stops an elbow or a kicked leg reaching you, and that is what the UK super king adds.
How much space does each person get on a super king mattress?
Two people sharing a UK super king get 90cm each, the same width as a UK single mattress. Compared with a UK double, that is 22.5cm more each. On the Komfi Vitality Excel, the firm core keeps that space feeling level, so neither of you rolls towards the other through the night.
Can a family with kids or dogs share a Komfi Vitality Excel super king?
It suits that routine well. The 180cm width means a child or a large dog in the middle doesn't push either adult to the edge, and the firm support core resists the sagging that a weight in the centre can cause on softer beds. Lighter side sleepers may still find the surface a little firm.
What bedding do I need for a super king Komfi Vitality Excel?
You'll need super king sheets and a 260 x 220cm duvet. The mattress is 25cm deep, so check that the fitted sheet's pocket depth is comfortably above that. Before ordering, measure your bedroom door swing and bedside clearance too, as a 6ft wide bed leaves less margin than you might expect.