The Sleepeezee Cosmic 3000 Combination Mattress is a confident, modern hybrid that leans into comfort without drifting into the kind of softness that leaves sleepers feeling unsupported. In-store, it comes across as a premium, substantial mattress with a notably deep profile, a cushioned pillow-top surface, and a more “polished hotel bed” feel than many hybrids at this price point. The headline is the cooling-led comfort package, graphite memory foam paired with a Breeze 3D knit cover, backed up by micro and pocket springs for a steadier, more adaptable base.
Construction & materials
This is a layered hybrid built around graphite-infused memory foam, plus micro springs and pocket springs. That mix typically works well because the foam handles the close-to-the-body pressure relief, while the springs take over the heavier lifting of support and push-back. The Breeze cover is a practical, consumer-friendly touch, it is designed to be up to 40% more breathable, and it gives the surface a fresher, more ventilated first impression than a dense, flat-knit fabric.
There is also an edge-to-edge support system, which matters more than most people expect. It is the difference between a mattress that feels full-size in everyday use, and one that feels like it shrinks once someone sits near the side.
Comfort, firmness & feel
Firmness lands firmly in the medium-to-firm bracket. The pillow top and memory foam create an inviting first contact, but it does not collapse underneath. In-store, the sensation is closer to “gentle contour with structure underneath” rather than the slow, deep sink associated with heavier memory-foam mattresses. That makes it easier to change position and stops the bed feeling overly enveloping.
For couples with different preferences, this specific balance is the big selling point. It has enough softness up top to take the edge off pressure points, but enough backbone underneath to keep the bed feeling purposeful.
Support & pressure relief
The Cosmic 3000 is built to reduce pressure points, and the design choices support that claim. The foam layer helps spread load around shoulders, hips and the lower back, while the pocket spring system adapts more locally than an open coil unit. In practical terms, it feels supportive without being rigid, and that is where medium-firm hybrids tend to outperform both very firm traditional springs and softer all-foam mattresses.
This is also the kind of construction that suits sleepers who want support first, but still want a touch of plushness, rather than a hard, flat feel.
Motion isolation
Partner disturbance is clearly a focus here, and it shows. Pocket springs reduce ripple-through movement compared with older spring systems, and the memory foam layer further damps down small vibrations. In-store, the feel is stable and controlled, not overly bouncy, which is exactly what most couples want. It is not a dead, foam-only stillness, but it does a strong job of limiting the kind of movement that wakes a light sleeper.
Temperature regulation
This mattress is marketed hard on cooling, and it largely earns it. The graphite memory foam is designed to prevent overheating by drawing away heat and moisture, while the Breeze cover increases airflow at the surface. Importantly, the spring layers also support airflow through the core, which usually helps hybrids avoid the “warm sponge” effect that can happen with deeper foam designs.
It is still a mattress with memory foam, so it will not feel as crisp and cool as a very taut, minimal-padding pocket-spring bed, but for a pillow-top hybrid it stays impressively fresh.
Edge support
Edge-to-edge support is one of the Cosmic 3000’s strongest practical wins. It feels secure when sitting on the side and more usable across the full width when sleeping near the perimeter. That matters for couples sharing a smaller size, and for anyone who dislikes the roll-off sensation common with softer-top hybrids.
Practicalities
The stand-out practical note is the depth. It looks and feels luxuriously tall, but it will ask more of bedding, deep fitted sheets are the sensible expectation here. It is made in the UK and positioned as “expertly made just for you”, which matches the overall presentation. There is also a 100 Night Comfort Guarantee, which is the right kind of reassurance for a mattress that sits in the premium-feeling, investment-buy category.
Who it suits
This medium-firm tension best suits average-weight back and side sleepers who want one mattress that can handle both positions without feeling compromised. Side sleepers who want pressure relief without excessive sink will like the gentle contouring from the memory foam and pillow top, while back sleepers should appreciate the more supportive base from the pocket and micro spring layers. It is also a strong option for couples, particularly where one partner moves more at night, thanks to the motion-reducing design and the stable, less bouncy feel.
Who it does not suit
Side sleepers with a pronounced hourglass shape, or anyone who needs deeper sink at the shoulder and hip to stay perfectly aligned, may find the medium-firm feel slightly too “held up” rather than deeply cradling. Equally, shoppers who want an ultra-firm, very flat traditional tension may find the pillow-top finish and memory foam comfort layer too cushioned, even if the support underneath is robust.
What customers liked
Feedback consistently highlights the balance of comfort and support, with several noting reduced aches and less stiffness on waking. The cooling feel is also repeatedly mentioned, along with a sense of premium build quality and a genuinely luxurious surface comfort. Couples, in particular, praise how well it minimises movement disturbance and how successfully it works for two sleepers with different firmness preferences.
Final verdict
The Sleepeezee Cosmic 3000 is a well-judged medium-firm hybrid that feels genuinely high-end in-store, deep, plush on top, and properly supportive underneath. Its best qualities are the controlled, comfortable surface feel, excellent edge support, and a cooling approach that makes sense for a pillow-top mattress. It is an easy recommendation for back and side sleepers of average weight and for couples who want comfort without the bounce and wobble. Those needing a noticeably softer mattress for extra shoulder and hip sink, or those chasing a very firm traditional feel, are better served elsewhere.
