Silentnight Comfort Breathe 1400 Mattress
Mattress
Silentnight Comfort Breathe 1400 Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
4
Layer Details
- Hand tufted sleep surface. A hand tufted top made from naturally hypoallergenic fabric, which means the fillings stay in place and sensitive sleepers get a gentler start. Silentnight describes this as a softer sleep surface, taking a little of the edge off the firm feel beneath.
- Comfort Breathe™ fibres. A second layer of breathable fibres for increased airflow and improved temperature regulation, which means heat is less likely to build up around you overnight. Silentnight says it also adds firmer pressure relief.
- 1400 Mirapocket springs. The springs sit in individual pockets and respond independently to your body's movements, which means zoned support and better spinal alignment rather than a uniform surface. The 1400 count is for the king size, with counts adjusted pro rata for other sizes.
- Durable case. A soft, hard-wearing outer case built to keep the mattress comfortable over the years. The underside is a polypropylene and polyester blend, with a polyester-led side border.
Layer details from silentnight.co.uk product page, September 2026.
- Real space for one: At 120cm wide, the UK small double is 30cm wider than the UK single, so you can stretch out or change position without meeting the edge.
- Fits rooms a double crowds: It's 15cm narrower than the UK double, which can be the difference between a bedroom that works and one where the door barely clears the frame.
- Firm support across the full width: The pocket springs respond independently along the whole 120cm surface, so you get consistent spinal support wherever on the mattress you settle.
- Cooler nights in smaller rooms: Compact bedrooms can hold heat, and the Comfort Breathe fibre layer is designed to keep air moving so warmth doesn't build up around you.
- Easy bedding to find: 4ft is a standard UK size, so small double fitted sheets are widely stocked, and a standard double duvet sits comfortably on top.
This size suits you if...
You sleep alone and have outgrown a single, but your room can't spare the extra 15cm a UK double demands. Perhaps it's a teenager's bedroom where floor space still matters, a loft conversion with limited standing room, or a guest room where couples stay occasionally rather than nightly. You also want a firm, supportive feel rather than a soft, sink-in one.
Consider another size if...
You share the bed every night, in which case 120cm will feel snug for two adults over time. We'd recommend the UK double instead, allowing at least 2.6m x 2.8m of room space for it.
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Is a small double big enough for the Silentnight Comfort Breathe 1400 to suit a couple?
For occasional nights, yes, which makes this size a sensible guest room choice. For every night, two adults on 120cm will feel the squeeze, and the firm feel means neither of you sinks toward the middle, but elbow room is still tight. Regular sharers should look at the UK double, which is 15cm wider.
What room size do I need for a small double Silentnight Comfort Breathe 1400?
We suggest allowing at least 2.4m x 2.8m. That leaves enough space to walk round the bed and open drawers without shuffling sideways. If your room is smaller than this, measure carefully before ordering, paying particular attention to door swing and any sloping ceilings in loft rooms.
Does the small double have fewer springs than the king size?
Yes, slightly. Silentnight's 1400 count applies to the UK king, and spring counts adjust pro rata for other sizes, so the UK small double has proportionally fewer across its 120cm width. The spacing and support per square inch stay the same, so you won't feel any difference in firmness.
Is the Silentnight Comfort Breathe 1400 small double good for a teenager?
It's a strong fit for a teenager who has outgrown a single but whose room can't lose much floor space, since it adds 30cm of width while staying the same 190cm length. The firm support suits growing back and front sleepers, though a lightweight side sleeper may find it a little unyielding.
What bedding fits this mattress in a small double?
You'll need small double (4ft) fitted sheets, which are a standard UK size and easy to find on the high street. For the top layer, a standard double duvet works well, giving a generous overhang on each side for one sleeper and adequate cover if two share occasionally.