Komfi Unity Deluxe Mattress
Mattress
Komfi Unity Deluxe Mattress
Size
Firmness
Firm
Construction
Depth (cm)
17
Layers
2
Layer Details
- Reflex Foam. A flexible reflex foam layer that supports spinal alignment, which means your back stays level rather than sagging into the mattress. It's the backbone of the Unity Deluxe's firm feel.
- Ecofoam. Made from recycled materials, this layer lowers the mattress's carbon footprint while adding a softer, cradling comfort above the firmer base. It takes a little edge off the firmness without undermining the support.
Layer details from mattressonline.co.uk product page, September 2026.
- Shallow enough for raised frames: At 17cm deep, it sits low enough on bunks, cabin beds and mid sleepers to keep the guard rail doing its job.
- Firm support for growing sleepers: The reflex foam layer keeps the surface level and supportive, which suits children and teens who need a stable base rather than a sink-in feel.
- Fits a crowded child's room: At 3ft wide, it leaves floor space for a wardrobe, a desk and toy storage in a bedroom already fighting for every metre.
- Practical for spare rooms: A single works well in a spare room that spends most of its life as an office, and this firm foam build handles occasional guest use without fuss.
- A recycled foam layer: The Ecofoam layer is made from recycled materials, adding a slightly softer top to the firm base with a lower carbon footprint than standard foams.
- Light on the budget: The UK single is the cheapest size in the range, and the prices shown on this page update as retailers change them.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares space with a desk and storage, you need a shallow mattress for a bunk or mid sleeper, or you want a firm, inexpensive single for a spare room that doubles as an office. It also suits a first flat or student room where the frame is provided and you only need the mattress.
Consider another size if...
You're an adult who sleeps in this bed every night and finds 3ft of width restrictive. We'd recommend the UK double instead: it's 45cm wider and the same length, and we suggest allowing at least 2.6m x 2.8m of floor space for it.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Will the Komfi Unity Deluxe UK single fit a bunk bed?
Yes, and it's a genuinely good match. At 17cm deep, it's shallower than many mattresses, so it sits low enough on a bunk, cabin bed or mid sleeper for the guard rail to stay effective. Check your frame takes a standard 90 x 190cm mattress before ordering, as some children's frames use shorter sizes.
Is the Komfi Unity Deluxe UK single a good choice for a child or teenager?
It suits this use well. The firm reflex foam base gives level, stable support for growing sleepers, and the 90 x 190cm footprint leaves room in a small bedroom for a desk and storage. Lightweight side sleepers may find it a little too firm at the shoulders and hips, so bear that in mind for smaller children.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single, which gives you room to walk alongside the bed and open a wardrobe. That makes it workable in box rooms and loft conversions where only a narrow footprint fits, and it's the reason two singles often work where one larger bed won't.
Would the UK small double suit me better than the UK single?
If the room can take it and the sleeper is an adult, possibly. The UK small double is 30cm wider than the UK single and the same length, and we suggest at least 2.4m x 2.8m of floor space for it. For a child's room, bunk or guest bed, the UK single is usually the more practical fit.
Where can I buy the Komfi Unity Deluxe in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so what you see reflects the current price for the UK single rather than a snapshot. It's the least expensive size in the range, which fits its role as a children's, bunk or spare room mattress.