Sleepeezee Jessica 1800 Pocket Gel King Size Mattress
The Sleepeezee Jessica 1800 Pocket Gel is a hybrid mattress, meaning it combines foam comfort layers with pocket springs, which gives you cushioning at the surface and proper support underneath.
- Gel layer disperses body heat
- Memory foam eases pressure points
- Minimises partner disturbance
£1,149
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Sleepeezee Jessica 1800 Pocket Gel King Size Mattress
Sleepeezee Jessica 1800 Pocket Gel Mattress
More available sizes
Mattress details
Mattress
Sleepeezee Jessica 1800 Pocket Gel Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Gel
Depth (cm)
27
Layers
4
Layer Details
Knitted cover
A soft knitted finish that adds cosiness while allowing air to move through, which means the surface stays fresher overnight. It is designed for breathability rather than heat retention.
StayCool™ Gel
A 3cm gel layer with an open cell structure, which creates space for airflow and helps disperse excess body heat. This is the layer doing most of the work if you normally sleep warm.
Memory Foam
A 3cm layer that gently moulds to your shape, which means pressure eases at the shoulders and hips where you sink in most. Helpful if you wake with aches from firmer surfaces.
Pocket Springs
1800 individual pocket springs in total: 1000 SoftTech mini springs that contour closely to your body, plus 800 traditional pocket springs beneath for support. Because each spring moves independently, you should feel less disturbance from a partner turning over.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- More room each: The UK king is 15cm wider than a UK double, which means 75cm each and a little more space before elbows and knees start meeting in the night.
- Less felt from an early riser: Each of the 1800 pocket springs moves on its own, so a partner leaving hours before you should cause less movement on your side.
- Length for taller sleepers: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, which gives feet room to settle rather than hang off the end.
- Cooler with two bodies sharing: A 3cm gel layer with an open cell structure helps body heat disperse, useful when two people share one surface all night.
- A middle step before super king: The UK king needs less floor space than a UK super king, so couples get a real upgrade without a room that has to be built around the bed.
This size suits you if...
You share the bed every night and have started to feel squeezed on a UK double, your partner keeps different hours and you want fewer wake-ups when they move, or one of you is close to six foot and needs the extra length.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, for which we suggest at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Will I feel my partner move on the Sleepeezee Jessica 1800 UK king?
You should feel less than on a narrower bed. The pocket springs work independently, which limits how far movement travels, and the UK king gives 75cm each against 67.5cm each on a UK double. That extra space helps if one of you gets up hours before the other.
Is the Sleepeezee Jessica 1800 UK king long enough for someone over 6ft?
The UK king measures 200cm, or 6ft 6in, which is 10cm longer than the UK double. For a tall partner, this length is often what they notice first, since feet and ankles are no longer pressed against the end of the mattress.
Jessica 1800 UK king or UK super king for a couple?
The UK super king gives 90cm each, 15cm more each than the UK king, and it is the same length. It needs more floor, though: we suggest at least 3m x 2.9m for the UK super king, compared with 2.7m x 2.9m for the UK king.
Is the Jessica 1800 in a UK king hard to turn on your own?
Across verified owner reviews, the mattress is described as heavy, and a UK king is a large surface to handle. If you usually rotate your mattress alone or find lifting difficult, plan for two people to do it.
How big a bedroom do I need for a Sleepeezee Jessica 1800 UK king?
We suggest at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable. New build master bedrooms can feel smaller once fitted wardrobes are in, so measure the clear floor space, not the room on the plan.