Firmness
Type
Pocket Spring
Depth (cm)
28
Number of Layers
4
Trial Period (nights)
60
Warranty (years)
5
Price Range
£489 to £949
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.
This mattress makes most sense if you want firm support with some help staying cool. The Mirapocket springs respond independently to movement, which means less disturbance from a restless partner and better spinal alignment for back and front sleepers. The Comfort Breathe fibre layer adds breathability, and the Purotex-treated cover is designed to reduce moisture and dust-mite allergens, a genuine plus for allergy-prone sleepers. Silentnight is a full member of the Furniture Industry Sustainability Program, if that matters to you. Yes, it's firm, and lighter side sleepers may find it a little unforgiving, but for those who need proper support at a mid-range price, it's a sensible shortlist candidate. Five sizes are available, from single to super king.
Key Features & what's inside
- 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.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it a little too unyielding around the shoulders and hips. If you prefer a sink-in, cushioned feel, or you want deep memory foam contouring, look elsewhere. It's also polyester-based throughout, so fans of natural fillings such as wool won't find them here.
Silentnight Comfort Breathe 1400 Mattress
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How firm is the Silentnight Comfort Breathe 1400?
Silentnight rates it as firm. That suits back and front sleepers who need solid support, although the hand tufted top and Comfort Breathe fibres soften the surface slightly. Lighter side sleepers may find it a touch too firm for comfortable pressure relief.
Does the Silentnight Comfort Breathe 1400 come with a trial?
Yes. Silentnight offers a 60-night trial, so you can sleep on it at home and return it within that window if it doesn't suit you. It also carries a 5-year guarantee, and delivery is within 14 days.
Is the Silentnight Comfort Breathe 1400 good for allergies?
It's a reasonable pick. The mattress is hypoallergenic and dust mite resistant, and the cover is treated with Purotex, which is designed to reduce moisture and dust-mite allergens. The sleep surface itself uses naturally hypoallergenic fabric.
How deep is the Silentnight Comfort Breathe 1400 mattress?
It's 28cm deep, and that depth is consistent across every size, from single through to super king. Most standard fitted sheets should cope with it comfortably.
What sizes does the Silentnight Comfort Breathe 1400 come in?
Five UK sizes: single, small double, double, king and super king, priced from £489 to £949. Note the 1400 spring count applies to the king size, with counts adjusted pro rata for smaller and larger sizes.
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