Sleepeezee Jessica 1800 Pocket Gel Mattress
Mattress
Sleepeezee Jessica 1800 Pocket Gel Mattress
Size
Firmness
Medium Firm
Construction
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.
- Room to turn without waking anyone: With 90cm each for two sharing, a restless partner has space to shift, and the independently moving pocket springs absorb much of the movement that distance alone doesn't.
- A clear step up from the UK double: You gain 22.5cm more each than the UK double, which is the difference between brushing elbows all night and barely noticing the other person.
- Wider than a UK king, same length: The UK super king is 30cm wider than the UK king but the same 200cm length, so all the extra space goes sideways, where sharers need it.
- Cooling when the bed gets crowded: A child or dog adds body heat, so the StayCool gel layer, which is designed to disperse heat, helps more at this size than in a single.
This size suits you if...
You share with a partner who tosses and turns, children or a large dog end up in the bed as a matter of routine, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m or your landing turns are tight. We'd recommend the UK king instead, and we suggest at least 2.7m x 2.9m for the UK king.
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.
Is the Sleepeezee Jessica 1800 UK super king worth it over the UK king?
If you share with a restless sleeper, it usually is. The UK super king is 30cm wider than the UK king and the same length, giving 15cm more each. The catch is the room: we suggest at least 3m x 2.9m for the UK super king, against 2.7m x 2.9m for the UK king.
Is the Sleepeezee Jessica 1800 UK super king heavy to move?
Sleepeezee doesn't publish a weight for this mattress, but across verified owner reviews buyers describe it as heavy, and the UK super king is the largest size it comes in. Plan on two people for rotating it, and check how your bedroom door swings and whether the landing turn leaves enough clearance before ordering.
Will a Jessica 1800 UK super king fit in a loft conversion bedroom?
Only if the floor space works. At 180 x 200cm, it usually needs to go against the full-height wall, since a sloping ceiling above the bed makes sitting up awkward. We suggest at least 3m x 2.9m of usable floor, measured where you can actually stand and walk, not wall to wall under the slope.
Can two adults and a child share the Sleepeezee Jessica 1800 in a UK super king?
Yes, far more comfortably than in a smaller size. Two adults get 90cm each, which is 22.5cm more each than the UK double, so a small visitor can squeeze in without anyone ending up on the edge. The medium firm feel stays supportive for the adults while a child curls up in between.
Is the Jessica 1800 UK super king a good choice for a light sleeper with a restless partner?
It's one of the better set-ups for it. The 90cm each for two sharing puts real distance between you, and the pocket springs move independently, so a partner turning over sends less motion across the bed. Space does most of the work here, and the springs reduce the disturbance that still reaches you.