Silentnight Comfort Breathe 1200 Mattress
Mattress
Silentnight Comfort Breathe 1200 Mattress
Size
Firmness
Construction
Depth (cm)
25
Layers
5
Layer Details
- 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.
- Real space for one: At 120cm wide, you get 30cm more room to spread out than a UK single offers, which most solo adults notice on the first night.
- Fits rooms a double crowds: It's 15cm narrower than a UK double, often the difference between a door that clears the bed frame and one that doesn't.
- Cooler in a snug room: Smaller bedrooms can run warm, and the Comfort Breathe fibre layer lets heat escape rather than build up around you.
- Springs that work solo: The 1200 Mirapocket springs respond to your body individually, so a lone sleeper gets zoned support across the wider surface rather than a uniform push-back.
- Easy to dress: 4ft is a standard UK size, so small double fitted sheets and frames are simple to find, and a standard double duvet drapes nicely.
This size suits you if...
You sleep alone most nights and have outgrown a UK single, your bedroom, box room or loft conversion can't take a full double without losing walking space, or you're furnishing a guest room where couples stay occasionally rather than nightly.
Consider another size if...
You share the bed every night and want proper space each. We'd recommend the UK double instead, which is 15cm wider and the same length; allow at least 2.6m x 2.8m for it.
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Is a UK small double big enough for one adult on the Comfort Breathe 1200?
Comfortably, yes. At 120 x 190cm you get 30cm more width than a UK single, so you can spread out or change position freely. The 1200 Mirapocket springs adjust to you individually across that width, and the medium/firm feel suits most back and front sleepers. Taller sleepers should note the 190cm length before buying.
Can a couple share the Comfort Breathe 1200 in a small double?
For occasional nights, such as guests or weekend stays, it works. For every night, 120cm shared between two adults feels tight, even with pocket springs limiting motion transfer. If you share regularly, sizing up to the UK double gives 15cm more width at the same length, and we suggest a room of at least 2.6m x 2.8m for it.
What room size do I need for a small double Comfort Breathe 1200?
We suggest allowing at least 2.4m x 2.8m. That leaves enough space to walk around the bed and open drawers or a wardrobe, which matters in the box rooms and loft conversions this size tends to end up in. Measure with the door swing in mind: the 15cm saved over a UK double is often what keeps it clear.
Will standard double bedding fit the small double version?
Partly. You need small double (4ft) fitted sheets, because standard double sheets are cut for a 135cm width and will sit loose. A standard double duvet works well on top, with a pleasing overhang on each side for one sleeper. Since 4ft is a standard UK size, sheets and frames are easy to find.
Should I choose the small double or the single for a teenager's room?
If the room can spare the width, the UK small double is the better long-term buy. It's 30cm wider than the UK single at the same length, so a growing teenager keeps room to sprawl for years. A UK single needs a room of at least 2.1m x 2.8m, so it remains the fallback where floor space is genuinely tight.