Sleepeezee Gel 4000 Pocket Hybrid Ortho Single Mattress
The Sleepeezee Gel 4000 Pocket Hybrid Ortho is a medium firm hybrid with a stitched-in pillow top, profiled Staycool™ gel and a dual-layer spring system that pairs 1,000 traditional pocket springs with 3,000 mini comfort springs.
- Medium-firm support for your spine
- Plush pillow top eases pressure
- Gel disperses excess heat
£639
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Sleepeezee Gel 4000 Pocket Hybrid Ortho Mattress
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Mattress details
Mattress
Sleepeezee Gel 4000 Pocket Hybrid Ortho Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Hybrid
Gel
Depth (cm)
35
Layers
5
Layer Details
Pillow Top
A plush pillow-top layer stitched into the mattress, acting like a built-in topper. It gives that hotel-style softness the moment you lie down.
Profiled Staycool™ Gel
Multiple layers of profiled Staycool™ gel gently contour to your body while dispersing excess heat. In practice, that means cushioning at pressure points without the warmth build-up some foams cause.
Soft Polyester Layers
Soft polyester layers sit beneath the gel, adding comfort without compromising support. They help the transition from the softer top into the firmer core feel gradual rather than abrupt.
High Density Polyester
A high-density polyester layer maintains the mattress's structure and durability. This is what helps the mattress hold its shape over years of use.
4000 Pocket Spring System
A dual-layer orthopaedic construction combining 1,000 traditional pocket springs with 3,000 mini comfort springs, 4,000 in total. The traditional springs handle deep support while the mini springs fine-tune how the surface responds to your body.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Fits a crowded child's room: At 3ft x 6ft 3in, the UK single leaves space for a desk, wardrobe and toy storage around the bed, which a growing child's room usually needs.
- Proper support for growing bodies: The medium firm feel and dual-layer springs keep a teenager's spine supported, and the stitched pillow top means the first touch is still soft.
- Cooler sleep in small rooms: Compact bedrooms and loft conversions can get stuffy, and the Staycool gel layers draw heat away, so you should wake up a little less clammy.
- Two can sit side by side: In a guest room or a shared children's room, a pair of UK singles gives each sleeper their own mattress and their own springs, with a walkway between.
- Easy under a sloping ceiling: The narrow footprint lets you tuck the bed along the low side of a loft conversion, with standing room kept on the open side.
This size suits you if...
You sleep alone and want orthopaedic-leaning support in a compact room, you're furnishing a teenager's bedroom or a first flat where the frame is already provided, or you're setting up a spare room with two separate beds for guests.
Consider another size if...
You share the bed with a partner most nights. We'd recommend the UK double instead: it gives 67.5cm each for two sharing, and we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Will the Sleepeezee Gel 4000 UK single fit a bunk bed or mid sleeper?
Possibly not safely. The mattress is 35cm deep, and raised frames usually set a maximum mattress depth so the guard rail stays high enough above the sleeper. Check your frame's stated limit before buying. If it's lower than 35cm, this mattress is better suited to a ground-level single frame.
Is the Sleepeezee Gel 4000 in a UK single a good choice for a teenager?
For most teenagers, yes. The medium firm support suits a growing frame, and the gel layers help if their room runs warm. Length is the one limit: the UK single is 190cm long, so a very tall teen may run out of room. The UK king is 10cm longer, though far wider too.
What size bedroom do I need for a Sleepeezee Gel 4000 single?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves room to walk around the bed and open drawers or a wardrobe. In a loft conversion, measure where the ceiling is high enough to sit up, since a 35cm mattress raises you higher than a slimmer one.
Can I put two Gel 4000 singles in a guest room instead of one bigger bed?
Yes, and it works well when guests may be friends or siblings rather than couples. Each person gets their own springs, so one turning over won't disturb the other. Measure for both beds plus a clear walkway between them, and bear in mind two deep mattresses need two sets of deeper sheets.
What bedding do I need for a Sleepeezee Gel 4000 UK single?
A standard single duvet at 135 x 200cm fits fine. The fitted sheet is where you need care: at 35cm deep, this mattress can pull ordinary single sheets off the corners. Look for single fitted sheets labelled deep or extra deep, and check the pocket depth on the packaging.