Sleepeezee Jessica 1800 Pocket Gel Mattress reviewed

The Sleepeezee Jessica 1800 Pocket Gel is a 27 cm, medium-feel hybrid that puts 3 cm of StayCool gel foam and 3 cm of memory foam over a two-tier unit of 1,800 pocket springs. It is made in the UK, carries a 10-year guarantee and, at the time of writing (September 2026), is sold by Mattress Online at a regular £749 in a single and £999 in a double, with the single reduced to £649 in the retailer’s end-of-summer sale.

How the Jessica 1800 is built

The spring system gives the mattress its name. Sleepeezee sets 1,000 SoftTech mini pocket springs near the surface, where they follow the outline of shoulders and hips, over 800 traditional pocket springs that carry most of the load. A foam frame encapsulates the whole unit, so the edge stays firm enough to sit on and the usable width does not shrink towards the sides.

Firmness and who it suits

Mattress Online rates the Jessica 1800 as medium, which we place at 5 on our 10-point scale, although some buyers in the retailer’s own reviews find it closer to medium-firm. Either reading sits in the band the research favours. A systematic review of 24 controlled trials in Sleep Health (Radwan et al., 2015) concluded that mattresses rated medium-firm, along with self-adjusted air beds, gave the best results for sleep comfort, sleep quality and spinal alignment.

Side sleepers and couples get the most from the 6 cm of foam and the independent springs, which limit how much one partner feels the other move. Stomach sleepers and anyone who wants to lie on top of the mattress rather than in it will be better served by the firm Sleepeezee Deluxe 1000 or Ultimate Ortho 2000.

Independent checks, sizes and ownership

Sleepeezee is an approved member of the National Bed Federation, whose Code of Practice has member factories audited by SATRA across ten areas including flammability and textile labelling, and Mattress Online states that the Jessica 1800 conforms to BS 7177 for domestic use, the British Standard for the ignition resistance of mattresses. Mattresses sold in the UK also fall under the Furniture and Furnishings (Fire) (Safety) Regulations 1988.

The Jessica 1800 is single-sided with turning handles, so care means rotating it head to toe rather than flipping it. Sleepeezee donates £20 to The Children’s Hospital Charity for every Jessica mattress sold. Two points count against it. Mattress Online’s 100-night Comfort Trial is an exchange, not a refund, and only applies if you also buy one of its mattress protectors and sleep on the mattress for at least 30 nights first. And at the double price it sits above what most British buyers spend: in a National Bed Federation survey of buyers carried out in November 2021, three quarters had paid under £800. Sleepeezee’s own site now leads with the newer Jessica Performance, while the 1800 remains in stock at Mattress Online.