Sleepeezee Gel 4000 Pocket Hybrid Ortho Mattress
Mattress
Sleepeezee Gel 4000 Pocket Hybrid Ortho Mattress
Size
Firmness
Construction
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.
- Real distance from a restless partner: With 90cm each, a partner who fidgets or gets up in the night is further away, which means their movement reaches you less often.
- Space when the household piles in: When a child wanders in at 3am or the dog claims the foot of the bed, the extra width means you can still lie flat rather than clinging to the edge.
- A step up from the UK king: The UK super king is 30cm wider than the UK king at the same length, giving each of you 15cm more across the mattress.
- Sized for a large master bedroom: In a generous period room or a big new build master, a UK king can look a little lost, whereas the UK super king fills the space in proportion.
- Cooling across a bigger shared surface: The Staycool gel layers disperse heat, which matters slightly more at this size, since two adults plus a child or pet generate more warmth between them.
This size suits you if...
You share the bed with a genuinely restless partner and want as much room between you as a standard size allows, or children and a large dog join you most nights, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is below 3m x 2.9m, or the narrow landing and door swing leave little room to manoeuvre. We'd recommend the UK king instead, for which we suggest at least 2.7m x 2.9m.
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Is the Sleepeezee Gel 4000 UK super king big enough for two adults and a child?
It is the most practical size for that arrangement. Two adults get 90cm each, so when a young child climbs in there is usually room in the middle without anyone being pushed to the edge. For regular co-sleeping with an older child as well as a pet, even a UK super king can start to feel full.
How much more room does the Sleepeezee Gel 4000 super king give than the king?
The UK super king is 30cm wider than the UK king, and both are 200cm long. That works out at 15cm more each for two people sharing: 90cm on the UK super king against 75cm on the UK king. The extra length stays the same, so the gain is all in width.
Will I still feel my partner move on a super king Sleepeezee Gel 4000?
The width helps a great deal. At 90cm each, there is more mattress between you, so a partner who turns over or gets up during the night is physically further from where you lie. If the disturbance you feel comes from a very restless sleeper, distance tends to make more difference than any comfort layer.
What sheets do I need for the Sleepeezee Gel 4000 in super king?
You'll need super king fitted sheets with deep pockets, because this mattress is 35cm deep and standard fitted sheets may struggle to tuck under. For the duvet, a 260 x 220cm size suits a UK super king. Bedding at this size costs more than king bedding, so factor it in when you plan.
Should a couple choose the Sleepeezee Gel 4000 super king over a double?
If your room allows, the difference is substantial. The UK super king is 45cm wider and 10cm longer than the UK double, giving 22.5cm more each: 90cm against 67.5cm. We suggest at least 2.6m x 2.8m for the UK double, compared with 3m x 2.9m for the UK super king, so measure first.