Silentnight UltraGel 1200 Pocket Pillowtop Mattress
The Silentnight UltraGel 1200 Pocket Pillowtop is a medium-feel hybrid that pairs 1200 Mirapocket springs with a gel infused comfort layer, which means you get body-shaping support with a noticeably cooler surface than plain foam tends to offer.
- Plush pillow top with cooling gel
- Minimises partner disturbance
- 60-night trial & 5-year guarantee
£478.77
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The Silentnight UltraGel 1200 has a plush pillowtop that sits over the top for a softer initial feel. At 28cm deep it should suit most standard fitted sheets. It comes in five sizes, from UK Single up to UK Super King. It is a sensible middle-ground choice: cushioned enough for side sleepers, supportive enough for backs, although if you prefer a firm, flat sleeping surface, you may find the pillowtop a little too plush.
Mattress specifications
Firmness
Medium
Type
Hybrid
Depth (cm)
28
Number of Layers
3
Trial Period (nights)
60
Warranty (years)
5
Price Range
£478 to £885
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
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 & layer details
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.
Best suited for?
Side sleepers
The plush pillowtop gives a softer initial feel with cushioning and pressure relief, which suits the shoulders and hips of anyone who sleeps on their side.
Back sleepers
Underneath the pillowtop, 1200 pocket springs adjust to your body weight and give zoned support, so lying on your back should still feel properly supported.
Couples
Each pocket spring moves on its own, which means less partner disturbance and easier movement when one of you shifts or gets up in the night.
Warm sleepers
The gel infused layer is designed to give a cooling sensation, so the surface should feel less heat-retentive than standard foam through the night.
Combination sleepers
Pocket springs that respond to your body weight make it easier to move between positions, while the cushioned pillowtop stays comfortable whichever way you end up.
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.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Silentnight UltraGel 1200 Pocket Pillowtop Mattress
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FAQ's
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 if you prefer a very firm feel, you 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.
What sizes does the Silentnight UltraGel 1200 come in?
Five UK sizes: Single, Small Double, Double, King and Super King. The mattress is 28cm deep.
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