If you’ve been scrolling through mattress listings looking for something that feels genuinely cooler at bedtime (rather than merely claiming to), the Silentnight UltraGel Cool-to-Touch 3000 Mirapocket Softer Mattress stands out for a simple reason: it’s built from the cover down to prioritise airflow, heat management and pressure relief, while still keeping that supportive, “proper mattress” feel that many people prefer over an all-foam sink.
It’s a tall, premium-feeling mattress with a generous box top and a notably plush surface comfort, but it isn’t a floppy, unsupportive soft bed either; it’s more accurately a medium feel with a softer, more welcoming top, combining gel foam comfort with layers of pocket springs that are designed to keep your posture in check, particularly through your lower back and hips. If you like the idea of a mattress that feels immediately inviting when you get in, yet still behaves sensibly through the night, this is very much aimed at that middle ground.
How it performed in our evaluation
Temperature and breathability
This mattress leans hard into the “cooler sleep” brief, starting with a cool-to-touch cover that gives you that crisp, freshly-made-bed sensation when you first lie down. That initial cool feel can be especially satisfying if you tend to run warm in the evenings, or you simply like a sleep surface that doesn’t feel stuffy or close.
Beyond the cover, the more meaningful work is being done by the UltraGel™ foam and the spring system beneath it. Silentnight states the gel foam is proven (via in-house laboratory testing) to be five times more breathable than standard memory foam, and the design logic makes sense: an open cell foam structure is generally better at allowing air to move than a denser, more closed memory foam, so you’re less likely to get that “heat-trap” sensation that some foam mattresses are known for. The mini pocket springs in the comfort layers also matter here, because they create small pockets of space and movement that encourage airflow through the top of the mattress rather than compressing into a stagnant layer.
Pressure relief and comfort feel
The overall sensation is cushioning and easing rather than stiff and upright, with the gel foam adapting to your shape to help spread load and reduce pressure build-up. Silentnight references pressure mapping analysis to support these claims, and in practical terms this should translate into less “hot spot” pressure around the shoulders and hips, particularly for side sleepers who need more give at those contact points to stay comfortable and aligned.
Importantly, it’s also described as responsive, meaning it should bounce back rather than leaving you feeling like you’re having to climb out of the bed when you change position. That balance — contouring without that heavy, slow-sinking sensation — is often what people are hoping for when they say they want pressure relief, but they don’t want to feel stuck.
Support and spinal alignment
Under the comfort layers you’ve got 2000 Mirapocket® springs (spring count based on king size), and they’re zoned to be firmer through the centre third, specifically to support the lower back and hips. In plain English, this is the part that tries to stop the mattress feeling like a soft cloud that gradually lets your midsection dip, which is often where back discomfort starts on plusher beds.
Then you’ve got an additional 1000 mini pocket springs housed within the box top, which add a little more buoyancy and help the mattress feel lively rather than flat. With pocket springs, you also tend to get better targeted support (because each spring moves more independently), and reduced motion transfer compared with older-style interconnected spring units, though you should still expect a more responsive, spring-influenced feel than you’d get from a deep all-foam mattress.
Motion isolation
Because this is a pocket-sprung mattress with additional mini pocket springs, it should do a respectable job of minimising disturbance from a partner compared with a traditional open coil mattress, as individual springs compress where weight is applied rather than sending a ripple across the whole surface. That said, you’re still dealing with springs and a responsive build, so it’s not going to be as “dead” and movement-absorbing as a very dense memory foam option; if you’re extremely sensitive to movement, foam-heavy models can still win on that single metric, even if they lose out on airflow.
Edge support
The mattress has a substantial profile (37cm deep), and the pocket-sprung core typically gives a more stable feel around the perimeter than softer foam-only designs, especially when you’re sitting on the side to put socks on or when you naturally drift towards the edge during the night. Still, given the “softer” comfort direction and the plusher top, you may notice a little more compression at the very edge than you would on a firmer-tuned equivalent, particularly if you regularly sit in the same spot.
Materials and construction
The Silentnight UltraGel Cool-to-Touch 3000 Mirapocket Softer Mattress is essentially a layered comfort-and-support build, designed to feel plush on top while staying structured underneath. From the sleeper’s perspective, the most important pieces are:
- Cool-to-touch cover fabric to create an immediately crisp, refreshing surface feel.
- UltraGel™ foam comfort layer designed to be breathable and responsive while offering pressure relief.
- Soft white fibre layers that help keep the comfort section feeling fresh and airy.
- 1000 mini pocket springs within the box top to boost bounciness, comfort and airflow through the upper layers.
- 2000 Mirapocket® springs (king size count) forming the main support core, zoned to be firmer through the centre third for enhanced lower back and hip support.
- Single-sided design with four side turning handles (useful for rotating, even if you won’t be flipping it).
The box top finish also gives it a more premium, hotel-like look, and it provides a clearly defined comfort layer that you can feel as soon as you lie down, which is often what people are responding to when they describe a mattress as “luxurious” or “indulgent”.
Who it’s best for
This mattress makes the most sense for sleepers who want a cooler, fresher-feeling bed but don’t want to compromise on that supportive pocket-spring foundation, and who also prefer a medium comfort level with a softer top rather than a very firm, sleep-on-the-surface feel.
- Side sleepers, particularly those who want pressure relief at the shoulders and hips without losing underlying support.
- Back sleepers who like a medium feel and prefer a touch of cushioning; if you know you do best on firmer beds, the firmer version in the range may be the safer option for long-term lumbar support.
- Average-weight sleepers who want a balanced combination of contouring and spring-led structure, and who don’t want an overly sinking foam sensation.
- People who tend to sleep warm and want cooling features that go beyond marketing, combining a cool-touch cover with a more breathable comfort build.
Firmness and feel
Despite the “Softer” name, the stated feel is medium, and that’s an important distinction: you’re getting a snuggly, sink-in welcome from the top layers, but the pocket spring system underneath is there to stop the mattress from becoming unsupportive. For many people this is the sweet spot — comfortable from the moment you get into bed, but less likely to leave you feeling achy in the morning compared with a truly soft mattress.
If you sleep on your side, this medium-with-plush-top approach is often easier to live with night after night, whereas dedicated back sleepers (especially those who are very posture-conscious) sometimes find that going a touch firmer improves alignment and reduces the chance of the hips settling too deeply.
Practical details: height, handling and upkeep
At 37cm deep, this is a noticeably tall mattress, which can be a genuine plus if you like that substantial, layered feel and you want your bed to look and feel more premium. The trade-off is that it can be heavier and a bit more awkward to manoeuvre, so the side handles are a practical inclusion for rotating it. It’s single sided, so maintenance is about rotating rather than flipping, which many people prefer for convenience, as long as you keep on top of it.
Guarantee and build confidence
Silentnight includes a 5 Year Guarantee, covering manufacturer faults during that period, which adds reassurance for a mattress in this more premium bracket. It’s also made in the UK, and as a B-Corp certified brand Silentnight positions itself as taking environmental and social responsibility more seriously than the industry baseline, which may matter if you’re trying to make a purchase that aligns with broader values as well as comfort.
Bottom line: is the Silentnight UltraGel Cool-to-Touch 3000 Mirapocket Softer Mattress worth it?
If your priority list includes a cooler-to-the-touch surface feel, better-than-average breathability for a foam-comfort mattress, and a supportive pocket-sprung core that’s designed to keep your lower back and hips properly supported, this is a strong all-rounder with a distinctly plush first impression. It’s particularly well suited to side sleepers and anyone who wants a welcoming, pressure-relieving top without giving up the responsive, structured feel that springs provide.
The only real caveat is preference: if you know you’re happiest on a firmer, more “on top” mattress — especially as a dedicated back sleeper — you may be better served by choosing a firmer tension within the same family, but if you’re after that comfortable sink-in touch paired with sensible support, this model is very easy to recommend.
