Silentnight's Sleep Response Support Memory Cool 3600 Combination Mattress is a polished, premium-feeling hybrid that leans into two big promises, pressure-relieving memory foam and a cooler night than traditional foams. In-store, it comes across as a medium comfort mattress with a noticeable, gentle sink from the box top, but it is not the kind of slow, swampy memory foam that leaves sleepers feeling stuck. The overall impression is comfort-first, with enough spring structure underneath to stop it turning into a slouchy cloud.
Construction and materials
This mattress pairs contouring memory foam with responsive pocket springs, adding adaptive micro springs to sharpen responsiveness to small movements. The memory foam is graphite-infused and positioned as 15% cooler than standard memory foam, while the CoolEase cover is designed to draw heat away from the body. On top, the premium box top design adds depth and a plusher first contact, while the mattress is single-sided, so it is designed to be rotated rather than flipped.
Comfort, firmness and feel
The stated medium comfort rating feels accurate. There is an immediate cushioned welcome from the box top, then the foam conforms more decisively around shoulders and hips. That contouring is the main character here, it is noticeably more body-hugging than a basic sprung mattress, but it does not collapse. The micro springs add a subtle lift that keeps the surface feeling responsive rather than heavily damped, which helps it feel more "premium hybrid" than "solid memory foam".
Support and pressure relief
The combination of contouring foam and Mirapocket zoned support is clearly aimed at spinal alignment, and it feels like a mattress that wants to keep the midsection supported while still letting pressure points settle. The foam does a convincing job of easing load through the shoulders and hips, which is where many medium mattresses fall down. That said, the comfort stack is generous, so anyone who likes a very flat, firm sleeping plane may find the feel a little too cushioned, even with the supportive spring system underneath.
Motion isolation
With individually wrapped pocket springs and the cushioning effect of memory foam on top, movement is well controlled. It does not have the trampoline bounce of older open-coil beds, and the hybrid build reduces the sense of ripple across the surface. For couples, it presents as a sensible choice if one person tends to fidget, although it still feels like a responsive mattress rather than a deadened foam block.
Temperature regulation
This is the most pointed part of the spec, and in practice it feels like a memory foam mattress that has been engineered to avoid the usual heat build-up. The graphite-infused foam and CoolEase cover work towards a less sweaty, less clingy experience than traditional memory foam, and the spring layers help airflow compared with all-foam designs. It is not an "ice cold" mattress, but it is a credible attempt at making foam comfort more livable for warm sleepers.
Edge support
The perimeter feels stable enough for day-to-day use, with the spring support underneath preventing that dramatic roll-off feeling some softer, foam-heavy hybrids can have. It still has a plush top, so there is some compression at the edge, but it does not feel flimsy. It suits people who like to use the full width of the mattress, even if it is not a rigid, sit-on-the-side-with-zero-sink kind of build.
Practicalities
It comes with a 100 Night Comfort Guarantee, which is particularly useful for a mattress like this where the feel is very much about personal preference. The single-sided design keeps maintenance simple as there is no flipping, and the box top finish gives it a more luxurious look and feel on the bed. As a Dreams exclusive, it is aimed at shoppers who want to try before they commit, and it reads as a model built to feel like a step up from entry-level hybrids.
Who it suits
This medium tension works best for side sleepers, especially those who want a gentle sink around the shoulders and hips without losing overall support. It also fits average-weight sleepers looking for a balanced hybrid that combines pressure relief with a more responsive base than all-foam. Back sleepers who like a medium feel will get on with it, but the overall comfort profile is clearly tilted towards cushion and contour rather than a very firm, corrective feel.
Who it does not suit
It is not the right pick for anyone who actively dislikes memory foam's hug, even in a cooler, more responsive format. Sleepers who want a distinctly firm mattress, or who prefer to feel completely on top of the bed with minimal give, will likely find the box top too indulgent. Back sleepers who crave a firmer, flatter feel for maximum resistance under the hips may prefer stepping up to something with less surface plushness.
Final verdict
The Silentnight Sleep Response Support Memory Cool 3600 is a strong hybrid for shoppers who want proper memory foam contouring but have been put off by heat retention in the past. The medium feel is convincing, the box top adds a genuinely luxurious first impression, and the spring system gives it structure and a calmer kind of bounce. The trade-off is that it prioritises comfort and pressure relief over a truly firm, no-sink profile, so it is a better buy for side sleepers and comfort-seekers than for people chasing a very firm, ultra-stable surface.
