Firmness
Type
Pocket Spring
Depth (cm)
25
Number of Layers
5
Trial Period (nights)
60
Warranty (years)
5
Price Range
£379 to £729
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.
If you're a hot sleeper, this is where the Comfort Breathe 1200 makes its case. The comfort layer swaps traditional memory foam for airflow-promoting fibres, so you get cushioning without the warm, sinking feeling foam can create. The 1200 Mirapocket springs move independently, which means your partner shifting position is less likely to disturb you, and support adjusts to your shape rather than pushing back uniformly. Silentnight pitches the zoned support at sleepers with back or neck pain. The medium/firm feel suits most back and front sleepers, and with five sizes from UK Single to Super King, plus that 60-night trial, you have room to change your mind if it doesn't suit.
Key Features & what's inside
- Sleep surface. A naturally hypoallergenic fabric surface that's soft against the skin. A sensible choice if allergies or sensitive skin are a concern.
- Comfort Breathe®. Silentnight says these fibres are 15x more breathable than standard memory foam, promoting airflow and regulating temperature. In practice, that means less overnight heat build-up, which hot sleepers will appreciate.
- 1200 Mirapocket spring unit. 1200 pocket springs respond individually to your body's movements, which means support where you need it rather than a one-size-fits-all push-back. The zoning is designed to aid spinal alignment, helpful if back or neck pain is part of your mornings.
- Protective Layer. This layer spreads pressure from the spring unit across the mattress, which means less localised wear over time. It's there for longevity rather than feel.
- Durable case. A soft but hard-wearing outer case designed to keep the mattress comfortable for years. Unglamorous, but it matters for how the mattress ages.
Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
If you love the slow, cradling sink of memory foam, the fibre comfort layer here feels springier and won't give you that hug. Lightweight side sleepers may also find the medium/firm feel a little too solid at the shoulder and hip. And if you want a plush, deep pillow-top, look elsewhere.
Silentnight Comfort Breathe 1200 Mattress
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Is the Silentnight Comfort Breathe 1200 good for hot sleepers?
Yes, that's its main strength. The Comfort Breathe fibre layer is, per Silentnight, 15x more breathable than standard memory foam, promoting airflow and temperature regulation. If you regularly wake up warm on a foam mattress, this design should feel noticeably fresher.
How firm is the Silentnight Comfort Breathe 1200?
Silentnight rates it as medium/firm. That suits most back and front sleepers and heavier side sleepers, although lightweight side sleepers may find it slightly too firm for full pressure relief at the shoulder.
Does the Silentnight Comfort Breathe 1200 come with a trial?
Yes. Silentnight offers a 60-night trial, so you can sleep on it at home and return it if it doesn't suit. It's also backed by a 5-year guarantee, with delivery listed at 14 days.
How deep is the Silentnight Comfort Breathe 1200?
It's 25cm deep, a fairly standard depth that most fitted sheets will accommodate without any trouble.
What sizes does the Silentnight Comfort Breathe 1200 come in?
Five sizes: UK Single, Small Double, Double, King and Super King. Prices range from £379 to £729 depending on the size you choose.
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