Coolflex Essentials Pocket Mattress
Mattress
Coolflex Essentials Pocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
24
Layers
3
Layer Details
- Knitted cover. A super-soft knitted cover with a touch of breathability, which means a gentler first impression when you lie down and a little help letting warm air escape.
- Soft foam comfort layer. A layer of soft Reflex foam sits beneath the cover, cushioning shoulders and hips. It softens the feel of the springs below without making the mattress feel plush overall.
- 800 pocket spring unit. Pressure-reactive springs work independently, which means support tailored to where your body needs it and virtually no motion transfer across the bed. If you share, you should feel far less of your partner's movement.
Layer details from mattressnextday.co.uk product page, September 2026.
- Fits compact rooms: At 90cm wide it slots into small bedrooms and loft conversions with awkward footprints, and we suggest allowing at least 2.1m x 2.8m of floor space.
- A slim profile suits raised frames: The 24cm depth sits comfortably in most bunk beds, cabin beds and mid sleepers, though you should check your frame's maximum mattress depth before buying.
- Proper springs at a starter price: The 800 pocket spring unit gives a child or teen genuine adjustable support rather than the basic foam slab many budget singles rely on.
- Medium firm works for guests: A balanced feel suits most sleeping positions, which matters in a spare room where you can't predict who'll be using it.
- Easy, cheap bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child or teenager and want real pocket springs without a big outlay, you need a mattress for a bunk, cabin or mid sleeper frame where the slim 24cm depth is an advantage, or you're kitting out a spare room or study that occasionally hosts guests and doesn't need anything wider than 90cm.
Consider another size if...
You're an adult who'll sleep on it every night and finds 90cm restrictive, especially if you move around. We'd recommend the UK small double instead, which is 30cm wider and the same length; allow at least 2.4m x 2.8m for it.
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Will the Coolflex Essentials UK single fit a bunk bed?
Usually, yes. Its 90 x 190cm footprint matches standard UK bunk frames, and the 24cm depth is slimmer than many hybrids, which helps with safety rail height on a top bunk. Frames vary though, so check the maximum mattress depth your bunk manufacturer specifies before ordering.
Is the Coolflex Essentials single a good mattress for a child?
It's a reasonable choice for a child or teen. The 800 pocket springs adjust to a growing body rather than pushing back evenly, and the medium firm feel avoids the extremes of very soft or very hard. The soft Reflex foam layer adds surface cushioning for lighter frames.
Can two Coolflex Essentials UK singles fit in one guest room?
Often, yes. Each mattress is 90cm wide, and we suggest at least 2.1m x 2.8m of floor space for one UK single, so a modest spare room can take two with a walkway between them. Measure your room first and remember to leave space for doors and drawers to open.
Is a UK single big enough for an adult on this mattress?
For occasional use, such as a guest bed or a first flat, most adults manage fine on 90cm. As an every-night bed it can feel tight, particularly for restless or broader sleepers. Sizing up to the UK small double adds 30cm of width at the same 190cm length.
How much space does the Coolflex Essentials single need in a small bedroom?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves room to walk alongside the bed and open a wardrobe, which matters in a child's room where the bed competes with a desk and toy storage. The mattress itself is 90 x 190cm, or 3ft x 6ft 3in.