Rest Assured Kelbrook Mattress
Mattress
Rest Assured Kelbrook Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
Layers
2
Layer Details
- Pocket springs. A core of 1400 pocket springs, each sewn into its own fabric pocket so it compresses independently. In practice this means support that adjusts to where you place weight, and less motion transferring across the bed.
- Wool fillings. Wool fillings sit above the spring unit, softening the surface slightly without undermining the extra firm feel. Wool also wicks moisture and breathes well, which helps if you tend to overheat at night.
Layer details from mattressman.co.uk product page, September 2026.
- Leaves floor space free: At 90cm wide, the UK single sits comfortably in a child's room that also has to hold a wardrobe, a desk and somewhere for toys to live.
- Room for two beds: Siblings sharing, or a guest room set up with a pair of singles, can usually keep a clear walkway between two Kelbrook UK singles.
- Standard frame dimensions: The 90 x 190cm footprint matches standard UK single frames, so a student room or first flat with a bed base already in place should take it without fuss.
- Firm support for back and front sleepers: The 1400 pocket springs each compress on their own, which means a solo back or front sleeper gets support that follows their shape rather than one flat push-back.
- Cooler in a small room: Wool fillings breathe better than synthetic ones, which helps in a box room or loft conversion where warm air tends to collect overnight.
This size suits you if...
You sleep alone on your back or front and want a genuinely solid surface, or you're kitting out a teenager's room, a spare room or a bunk frame where a 90cm width is all the floor plan allows.
Consider another size if...
You sleep alone but sprawl, or share the bed occasionally. We'd recommend the UK small double instead: it is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m for it.
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Will the Kelbrook UK single fit a mid sleeper or cabin bed?
The Kelbrook UK single is 90 x 190cm, the standard single footprint, so it should sit on most single raised frames. Raised beds also set a maximum mattress depth so the guard rail stays high enough to be safe. Check the Kelbrook's depth on the retailer listing against your frame maker's limit before you order.
Is the Rest Assured Kelbrook UK single too firm for a child?
It may be. The Kelbrook is extra firm, and lightweight sleepers tend to rest on top of a surface like this rather than sinking in slightly. An older child or teen who sleeps on their back could suit it well. A small child who curls up on their side will probably find it hard at the shoulder and hip.
How much room do I need for a Kelbrook UK single?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves room to get in and out of bed and to open a wardrobe or drawers alongside it. If you're fitting two singles for siblings or guests, measure for both beds plus a walkway between them.
Is a UK single mattress big enough for an adult?
For one adult of average height, usually yes: the UK single is 190cm long and 90cm wide. Taller sleepers may want more length, and the UK king is 10cm longer. We suggest at least 2.7m x 2.9m of floor space for a UK king, so check your room size first.
Kelbrook single or small double for a teenager?
If the room is tight, or the bed is going on a single frame, the Kelbrook UK single is the practical choice. A teen who has started to sprawl may be more comfortable on the UK small double, which is 30cm wider at the same length. We suggest at least 2.4m x 2.8m of floor space for the UK small double.