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.
- Fits a compact room: At 90cm wide it leaves space for a desk, wardrobe and toy storage in rooms where every centimetre is already spoken for.
- Firm support for growing sleepers: The Mirapocket springs respond independently to movement, which means a teenager gets support shaped to their body rather than one flat push back.
- Cooler for warm sleepers: Comfort Breathe fibres are designed for increased airflow, which means less heat build-up in small bedrooms and loft rooms that warm up in summer.
- Gentler for sensitive skin: The hand tufted surface is naturally hypoallergenic, a genuine plus in a child's room where allergies are a worry.
- Easy, cheap bedding: Single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked and affordable bedding of any size.
This size suits you if...
You're buying for a child or teenager who needs proper firm support as they grow, you're furnishing a spare room or study that doubles as guest space, or you sleep alone in a compact room where a wider bed would crowd everything else out. It also suits a student room or first flat where the frame is already provided and you just need the mattress.
Consider another size if...
You're an adult who wants more room to stretch out, or you find 90cm restrictive. We'd recommend the UK small double instead: it's 30cm wider, the same length, and needs a room of at least 2.4m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Silentnight Comfort Breathe 1400 UK single a good fit for a child's bedroom?
Yes, with one caveat. At 90 x 190cm it's the standard children's size, and we suggest allowing at least 2.1m x 2.8m of floor space, which still leaves room for a wardrobe and desk in most kids' rooms. The firm feel suits growing backs, although a very light child may find it a little unyielding at first.
Will the UK single Comfort Breathe 1400 fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk and mid sleeper frames. Depth is the thing to check: this mattress is 28cm deep, and many raised frames specify a maximum depth so the guard rail stays effective. Check your frame's guidance before buying, particularly for a top bunk.
How many springs does the single size of the Comfort Breathe 1400 have?
Fewer than 1400. That count applies to the king size, and Silentnight adjusts it pro rata for other sizes, so the UK single carries proportionally fewer springs across its smaller surface. Silentnight doesn't publish the exact single figure, but the support per square centimetre is the same, so the feel doesn't change.
Is a UK single big enough for an adult on this mattress?
For one adult sleeping alone, yes, though 90cm of width suits stiller sleepers better than those who sprawl. The firm Mirapocket springs support back and front sleepers well at any body size. If you regularly wake pressed against the edge, the UK small double is 30cm wider and the same length.
Where can I compare prices for the Comfort Breathe 1400 in a single?
The prices shown on this page are updated as retailers change them, so compare the retailers listed here rather than relying on a figure you saw elsewhere. Single sizes are often discounted differently from doubles and kings, so it's worth checking the live table even if you've already priced up another size.