Komfi Unity Memory Double Mattress in a Box
The Komfi Unity Memory Mattress in a Box has a Neuform memory foam top layer that gently contours your body, which means you get a cushioned, shaped feel in a 19cm foam mattress.
- Contouring memory foam top layer
- Even head-to-toe support
- Removable washable cover
£271.17
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Komfi Unity Memory Mattress in a Box
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Mattress details
Mattress
Komfi Unity Memory Mattress in a Box
Size
Firmness
Construction
Eco-Friendly
Foam
Memory Foam
Rolled
Depth (cm)
19
Layers
3
Layer Details
Neuform memory foam
A memory foam top layer that Komfi says gently contours your body shape, which means it should cushion you and follow your outline as you lie down.
Reflex foam
A soft Reflex foam layer for gentle head-to-toe, edge-to-edge support, which means the support should feel even across the whole mattress.
Ecofoam base core
The Ecofoam base forms the core of the mattress and, Komfi says, has a reduced carbon footprint, so it gives the layers above a foundation with a lighter environmental impact.
Layer details from komfi.com product page, October 2026.
Key benefits
- Space for two, space for furniture: At 135 x 190cm, the UK double still leaves room for bedside tables on both sides once your bedroom reaches around 3m x 3m, which we'd call the comfortable norm.
- Even feel across the width: Komfi says the Reflex foam gives edge-to-edge support, which means the outer part of each person's 67.5cm should feel as steady as the middle.
- Bedding you already own: Double sheets and a 200 x 200cm double duvet fit, so you can make up the bed from whatever is already in the airing cupboard.
- A proper bed for visiting couples: In a spare room, the UK double gives guests a shared bed that feels like a real double without crowding out a wardrobe the way a UK king might.
- Easier to freshen between guests: The zipped cover comes off for washing, which helps when different couples sleep on the UK double from one visit to the next.
This size suits you if...
You share the bed with a partner most nights and your bedroom is at least 2.6m x 2.8m, or you're kitting out a guest room for visiting couples and want a shared bed that still leaves space for a wardrobe and a chest of drawers.
Consider another size if...
You both want more than 67.5cm each, or one of you needs extra length. We'd recommend the UK king instead: it gives 75cm each, and we suggest at least 2.7m x 2.9m for the UK king.
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FAQ's
Is the Komfi Unity Memory UK double big enough for two people?
For most couples, yes. The UK double gives you 67.5cm each across its 135cm width. That is 7.5cm less each than the UK king, so if either of you sleeps spread out or you often get disturbed by a partner, the extra width of the UK king may suit you better.
What size bedroom do I need for a Komfi Unity Memory double?
We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm if you want bedside tables and room to walk round. In imperial, the mattress itself measures 4ft 6in x 6ft 3in.
What sheets and duvet fit the Komfi Unity Memory UK double?
Standard double sheets fit the 135 x 190cm surface, and a 200 x 200cm double duvet covers it well for two. The mattress is 19cm deep, so check that a fitted sheet's pocket depth suits a mattress of that thickness before you buy.
Komfi Unity Memory UK double or UK king for a couple?
The UK double is 15cm narrower and 10cm shorter than the UK king. Choose the UK double if your room is tight or you're happy with 67.5cm each. If you have the floor space, we suggest at least 2.7m x 2.9m for the UK king, which gives 75cm each.
Is a UK double or UK small double better for sharing the Komfi Unity Memory?
For regular sharing, we'd lean towards the UK double, which is 15cm wider than the UK small double at the same length. The UK small double makes more sense for a solo sleeper in a smaller room, and we suggest at least 2.4m x 2.8m for it.