Firmness
Type
Hybrid
Depth (cm)
28
Number of Layers
3
Trial Period (nights)
60
Warranty (years)
5
Price Range
£525 to £939
Best Sleeping Position(s)
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Choose this one if you like a cushioned surface but still want proper spring support underneath. The 1200 individual pocket springs adjust to your body weight, which means less partner disturbance and easier movement than a traditional open-coil bed. The gel infused layer is designed to give a cooling sensation, helpful if you tend to run warm at night. Silentnight backs it with a 60-night trial and a 5-year guarantee, and delivery is quoted at 14 days. Yes, the pillowtop means you cannot flip the mattress, but regular rotation should keep the comfort layers settling evenly. It sits at a fair mid-range price for a branded hybrid with cooling features.
Key Features & what's inside
- UltraGel layer. A gel infused layer that responds to your movements and provides a cooling sensation. In practice, that means the surface should feel less heat-retentive than standard foam.
- Pillowtop. A plush pillowtop sewn on top for extra comfort and pressure relief to soothe aches and pains. This is what gives the mattress its softer initial feel before you reach the support layers.
- Mirapocket springs. 1200 Mirapocket springs provide zoned support, with each individual pocket spring adjusting to your body weight. That translates to ease of movement and a more undisturbed night's sleep if you share the bed.
Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a firm, unyielding surface, the plush pillowtop on this medium-feel mattress will likely feel too soft. It is also single-sided, so anyone who wants a flippable mattress should look elsewhere. Strict foam-avoiders may prefer an all-natural-fill alternative, as the comfort layer here is gel infused foam.
Silentnight UltraGel 1200 Pocket Pillowtop Mattress
How firm is the Silentnight UltraGel 1200 Pocket Pillowtop?
Silentnight rates it as medium. Combined with the plush pillowtop, expect a cushioned surface with supportive pocket springs underneath, which suits most back and side sleepers, although lovers of a very firm feel may find it too soft.
Does the Silentnight UltraGel 1200 sleep cool?
It is designed to. The UltraGel layer is gel infused foam that Silentnight says provides a cooling sensation as it responds to your movements, so it should feel less warm than a standard foam-topped mattress. Hot sleepers are a good fit for this design.
How many springs does the Silentnight UltraGel 1200 have?
It has 1200 Mirapocket springs, confirmed by the product name and specification table. Each spring moves independently and adjusts to your body weight, which helps reduce partner disturbance and makes it easier to change position at night.
What trial and guarantee comes with the Silentnight UltraGel 1200?
Silentnight's own site lists a 60-night trial and a 5-year guarantee, with delivery quoted at 14 days. Terms can differ if you buy through a retailer, so check before ordering. It is stocked by 3 retailers at the time of writing.
What sizes does the Silentnight UltraGel 1200 come in?
Five UK sizes: Single, Small Double, Double, King and Super King. Prices range from £525 to £939 depending on the size you choose, and the mattress is 28cm deep.
Couldn't find an answer to your question? Send us a message