Why our sleep experts loved it
I have been testing the Sleepeezee Cooler Extreme 1800 for a few hours in store, and it is one of those elusive medium-feel mattresses that provides a relaxing, pillowy cloud effect without the claustrophobic, spongey feel of some foams. The generous spring count in tandem with the pressure-sensing gel layer means you get that luxuriously slow, cradling sink that might be associated with memory foam without some of the distinctly less fresh, less dry surface feel. The price is at the higher end of the scale for a mainstream model, but that is fairly typical for Sleepeezee, and there is a genuine sense of build quality in both the craftsmanship and the bed’s capacity to provide consistent support through the night.
Construction & Materials
This is a 30 cm hybrid that boasts 1800 pocketed and Softech springs across a king size, which is then layered with StayCool gel and supported with a layer of Superbond foam. The cover is a naturally cool fabric that is designed to draw heat away, while the perimeter of the mattress feels properly braced and robust due to the presence of specific edge support. The edge is standard taped borders with stitched carry handles, and the whole mattress is handmade in the UK. The spec sheet is mature and utilitarian rather than gimmicky, which I am always a fan of.
Firmness & Feel
Its official rating is medium, but on the first couple of nights it felt a bit firmer than that, then relaxed to a true medium as the upper layers loosened up. The StayCool gel provides the familiar, slightly slow-to-settle hug around the shoulders and hips that memory foam purports to offer, but without the sticky side of the equation. There is a little more rebound and support on the bottom layer, where the combination pocket and Softech spring system imparts some helpful buoyancy. This keeps the lumbar region suspended and the spine in a nice flat alignment when lying on my back, and resists hips sagging too much on my side.
Performance & Support
Pressure relief is the big talking point. The gel layer redistributes stress on the bony protuberances without engulfing you, and the springs react in tiny micro-increments. I found almost no movement transfer when my partner rolled over or adjusted position, which is in line with the idea of pocket springs. Edge support is much better than you would expect from a pillowtop-style comfort configuration, so I could sit on the side to read or tie my shoes without the edge collapsing. All in all, it feels much more controlled and stable across the whole surface area, including the corners.
Temperature Regulation
If you are prone to overheating, this model makes a very good case. The cool-touch cover not only reflects a lot of the initial heat away, but the StayCool gel noticeably curbs heat retention compared with more conventional visco foams. I never hit that sweaty, muggy midpoint in the night; the surface actually stayed nicely neutral and dry even after one very still, hot night. For a contouring bed, this is exactly the kind of performance I want to see.
Practical Features
Rotation rather than flipping is required, which makes sense for a layered hybrid at this height. The stitched handles are robust enough for two people to use to rotate, and the 20-year structural guarantee is a welcome vote of long-term confidence. As always, anyone interested in a mattress of this depth should check that their bed base slats are no further than 7 cm apart for stability and longevity. Available sizes range from single up to super king.
Who It Suits
Hot sleepers: those after the contour of memory foam but not the heat will likely take to the gel-led comfort feel of this mattress.Side and combination sleepers: up to average and moderately heavy builds will find the medium tune supportive without feeling pressure spikes at the shoulder or hip.Couples: anyone who prioritises low motion transfer and good edge integrity will appreciate the pocket spring layout and reinforced border.
Who It Doesn't Suit
Strict stomach sleepers: or very high body weight customers who like a firm, plank-like surface may prefer a denser, flatter midsection.Shoppers on a strict budget: may find that the Sleepeezee badge and higher-spec build are reflected in the price. The core mark is at the premium end of the category, although promotions do crop up.
Final Verdict
The Sleepeezee Cooler Extreme 1800 has the feel of a carefully balanced hybrid. It gets the basics right: precise pocket spring support, the pressure-smoothing gel comfort layer, and a good level of attention to thermal control. It delivers that memory-foam-esque hug without the temperature downsides that many have been craving for. The price is at the toppy end of the scale, but typical for Sleepeezee, and the spec plus the long structural guarantee go some way to justifying the outlay. If you are after cool, even comfort with good full-surface support credentials, this is one that should be at the top of your shortlist.
Why you can trust WantMattress
We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about
how we test .
