SleepSoul Cooler Ortho 4000 Series Pocket Gel Single Mattress
The SleepSoul Cooler Ortho 4000 Series is a firm hybrid mattress that pairs pocket springs with cool gel memory foam, which means you get orthopaedic-style support with less of the heat build-up foam is known for.
- Cool-touch cover for hot sleepers
- Firm, targeted spring support
- Hypoallergenic & vegan friendly
£379
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SleepSoul Cooler Ortho 4000 Series Pocket Gel Mattress
More available sizes
Mattress details
Mattress
SleepSoul Cooler Ortho 4000 Series Pocket Gel Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Orthopaedic
Depth (cm)
26
Layers
3
Layer Details
Cooler™ Fabric Cover
A cool-feel knitted fabric cover that gives an instant cooling effect the moment you lie down. It also enhances breathability, helping air move through the mattress.
Cool Gel Memory Foam
Thick layers of memory foam infused with gel microbeads, which actively draw heat away from your body. That means the contouring comfort of memory foam without the warm, sticky feel it can sometimes have.
Pocket Springs
Firm pocket springs, each sitting in its own fabric pocket so they compress independently. This gives targeted support and pressure relief where your body needs it, rather than a uniform push-back.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Leaves room for everything else: At 90cm wide, the UK single leaves floor space for a desk, wardrobe and toy storage in a small child's or teenager's bedroom.
- Cool feel for warm teenagers: Teenagers often sleep hot, and the gel memory foam and cool-touch cover are designed to draw heat away rather than trap it overnight.
- Firm support for solo back and front sleepers: A single adult who sleeps on their back or front gets the firm pocket spring support this mattress is built around, in a footprint that fits compact rooms.
- Two singles for flexible guest rooms: A pair of UK singles lets a spare room host two friends apart, or push together for a couple, which a single double bed can't offer.
- Fits under a sloping ceiling: The narrow footprint of the UK single tucks under the slope of a loft conversion, where a wider bed would leave no standing room beside it.
This size suits you if...
You're kitting out a teenager's room or a compact bedroom and want a firm, cooler-feeling mattress, or you sleep alone on your back or front and your room can't take anything wider. It also suits a spare room that doubles as an office, where floor space matters more than bed width.
Consider another size if...
You're an adult who sprawls or wants space to turn freely. We'd recommend the UK small double instead, which is 30cm wider at the same length; we suggest at least 2.4m x 2.8m for it.
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FAQ's
Will the SleepSoul Cooler Ortho 4000 UK single fit a bunk bed or mid sleeper?
The UK single width of 90 x 190cm matches standard bunk and mid sleeper frames, but at 26cm deep this mattress is thicker than many raised frames allow. Check the frame's maximum mattress depth and guard rail height before buying, as the rail needs to sit well above the sleeping surface.
Is the SleepSoul Cooler Ortho 4000 single too firm for a child?
It may be for a younger, lighter child. Firm mattresses give less cushioning to people who don't weigh much, so a small side sleeper may feel it on shoulders and hips. An older teenager who sleeps on their back or front is a better match for the UK single.
How much room do I need for a UK single SleepSoul Cooler Ortho 4000?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves enough room to walk around the bed and open drawers or a wardrobe beside it, which matters in a child's room or a box room.
Is the UK single SleepSoul Cooler Ortho 4000 big enough for an adult?
For one adult who sleeps fairly still, yes, at 90 x 190cm. Taller adults may prefer the UK king, which is 10cm longer, though it needs at least 2.7m x 2.9m of floor space. If width is the only issue, the UK small double adds 30cm at the same length.
Should I get two SleepSoul Cooler Ortho 4000 singles for a guest room?
Two UK singles give guests their own firm, cool-feel surface and let you arrange the room for friends or a couple. Allow space for a walkway between them. Compare the retailers listed on this page for current prices on the UK single.