Silentnight Comfort Breathe 800 Mattress
Mattress
Silentnight Comfort Breathe 800 Mattress
Size
Firmness
Construction
Depth (cm)
25
Layers
5
Layer Details
- Sleep surface. A naturally hypoallergenic fabric that's soft and gentle on the skin. A reassuring choice if you're sensitive to allergens.
- Comfort Breathe®. Silentnight describes these fibres as 15x more breathable than standard memory foam, promoting airflow and regulating temperature. In practice, that means a cooler surface for hot sleepers.
- 800 Mirapocket spring unit. 800 individual pocket springs respond separately to your body's movements, which means zoned support and better spinal alignment. You shouldn't roll towards a partner every time they turn over.
- Protective Layer. This layer disperses pressure from the spring unit across the mattress. It's there to help the mattress last longer.
- Durable case. A soft, hard-wearing case designed to keep the mattress comfortable for years to come.
Layer details from silentnight.co.uk product page, September 2026.
- Room for two without dominating the bedroom: At 135 x 190cm, the UK double fits comfortably in rooms where the UK king would leave little space to walk around.
- 67.5cm each for two people sharing: That's the space each of you gets across the width, and the 800 Mirapocket springs respond individually, so one person turning shouldn't disturb the other.
- A cooler surface when you share: Two bodies raise the temperature under one duvet, and the Comfort Breathe fibre layer promotes airflow, which means less trapped heat between you.
- Bedside tables can stay on both sides: Allow at least 2.6m x 2.8m and most bedrooms will still take a table each side, which matters in a shared room.
- Easy to dress on a budget: Double sheets and duvets are sold everywhere at every price, useful if you're kitting out a whole home at once.
This size suits you if...
You share the bed every night and want the traditional couples' size in a typical UK bedroom, you're furnishing a first flat or a whole house and need the budget to stretch across several rooms, or you're setting up a guest room that visiting couples will actually be comfortable in.
Consider another size if...
You and your partner both like to spread out, or one of you is a restless sleeper who uses the full width. The UK king is 15cm wider and 10cm longer; allow at least 2.7m x 2.9m for it.
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 800 double big enough for a couple?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, and the 800 Mirapocket springs move independently, so you shouldn't roll towards your partner when they turn. If either of you sleeps starfished or you share with a pet, the UK king's extra 15cm of width would be the safer pick.
What room size do I need for the Comfort Breathe 800 in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space on both sides and, in most rooms, a bedside table each side too. If your bedroom is smaller, the UK small double is 15cm narrower and the same length, and we suggest at least 2.4m x 2.8m for it.
Will the Comfort Breathe 800 double get up the stairs in an older house?
At 135 x 190cm (4ft 6in x 6ft 3in) it's a manageable size for two people to carry, though pocket sprung mattresses don't fold the way some rolled foam ones do. If your terrace has a tight turn on the stairs, or a narrow new build landing, measure the awkward point before ordering.
Is the double a good choice for a guest room?
It's the natural guest room size. Visiting couples get a genuinely shareable bed rather than a squeeze, the medium feel suits most sleepers without asking anyone to adapt, and double bedding is cheap and easy to find. A UK king would be more generous, but it's 15cm wider and 10cm longer, which most spare rooms can't spare.
Where can I buy the Silentnight Comfort Breathe 800 in a double?
Compare the retailers listed on this page; the prices shown here are updated as retailers change them, so it's worth checking back if you're a few days from buying. Availability can differ between the UK double and other sizes, so a deal you saw on the UK king may not carry over.