Firmness
Medium Firm
Type
Hybrid
Depth (cm)
27
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£584 to £1,169
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
The appeal here is the balance between comfort and cooling. A 3cm StayCool gel layer sits near the surface with an open cell structure, which means heat has somewhere to go rather than building up around you. Beneath that, 3cm of memory foam cradles pressure points, and 1800 pocket springs handle the support. The spring unit is more clever than it sounds: 1000 mini springs contour to your shape while 800 traditional springs do the heavier lifting. Across verified owner reviews on Mattress Online it holds a 4.6 rating from 83 reviews, and it is a National Bed Federation approved brand. If you want memory foam comfort without the usual overheating, this is a strong candidate.
Key Features & what's inside
- 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.
Who's it NOT for?
If you prefer a properly firm surface, perhaps because you sleep on your front or simply like a solid feel, the medium comfort here may be softer than you want. Owner reviews also mention the mattress is heavy, so if you rotate your mattress alone or struggle with lifting, factor that in.
Sleepeezee Jessica 1800 Pocket Gel Mattress
Across 83 verified owner reviews on the Mattress Online product page, it scores 4.6, with customers reporting improved sleep, back pain relief and a cooler night, though several note its substantial weight makes it awkward to handle.
Is the Sleepeezee Jessica 1800 firm or medium?
Sleepeezee's product information describes it as medium. In practice that means a balanced feel: soft enough for side sleepers to sink in at the shoulder, with 1800 pocket springs providing support underneath. Lighter sleepers may find it feels slightly firmer than heavier ones do.
Does the Sleepeezee Jessica 1800 sleep cool?
It is designed to. A 3cm StayCool gel layer with an open cell structure sits near the surface to disperse body heat, and the knitted cover is made for airflow. Owner reviews mention a cooler sleeping experience, which is reassuring if memory foam has left you overheating before.
How deep is the Sleepeezee Jessica 1800 mattress?
It is 27cm deep, a fairly generous depth that should work with standard fitted sheets, though very shallow ones may be a snug fit. The depth comes from the combination of gel and memory foam layers over a full pocket spring unit.
Does the Sleepeezee Jessica 1800 come with a trial and guarantee?
Mattress Online lists a 100-night trial and a 10-year guarantee with this mattress. Both are that retailer's own terms, so if you buy elsewhere, check what your chosen retailer offers before ordering.
What sizes does the Sleepeezee Jessica 1800 come in?
Five UK sizes: single, small double, double, king and super king. Prices range from £584 to £1,169 depending on the size you choose, which sits at a mid-range price for a UK-handcrafted hybrid with this spring count.
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