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.
- Fits where other sizes won't: At 90cm wide it leaves floor space free in compact rooms, so a desk, wardrobe and toy storage can share the room with the bed.
- A cooler bed for growing sleepers: The Comfort Breathe fibre layer promotes airflow, which children and teens who run warm at night will feel as a less clammy surface.
- Undisturbed sleep in shared rooms: The 800 Mirapocket springs respond individually to movement, so a restless child settles without the whole mattress bouncing them awake.
- Suits raised frames: The 25cm depth sits comfortably within most bunk, cabin and mid-sleeper limits, though you should check your frame's maximum mattress depth before buying.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and both are the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You're buying for a child's room or a teenager, where a medium feel and a breathable surface suit a growing sleeper, or you need a guest bed for a spare room that doubles as an office. It also fits raised frames well, so it's a practical choice for bunks and mid sleepers, and for student rooms or first flats where the frame is provided but the mattress isn't.
Consider another size if...
You're an adult sleeping alone every night and 90cm of width feels tight when you stretch out. We'd recommend the UK small double instead, which is 30cm wider and the same length; allow at least 2.4m x 2.8m of floor space for it.
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Is the Silentnight Comfort Breathe 800 in a UK single suitable for a bunk bed?
Usually, yes. At 25cm deep it sits within the depth limits of most bunk, cabin and mid-sleeper frames, and the standard 90 x 190cm footprint matches UK frame sizing. Do check your frame's stated maximum mattress depth first, as guard rails on some children's beds need the mattress to sit lower.
How much room do I need for a UK single mattress?
The mattress itself is 90 x 190cm, and we suggest allowing at least 2.1m x 2.8m of floor space so you can walk round it and open drawers comfortably. That makes the UK single an easy fit in box rooms, loft conversions with a narrow usable footprint, and spare rooms that also hold a desk.
Is the Silentnight Comfort Breathe 800 single a good choice for a child?
It's a reasonable fit. The medium feel suits most growing sleepers, the sleep surface uses naturally hypoallergenic fabric, and the breathable fibre layer helps children who overheat at night. Very light children may sit more on top of the springs than a heavier adult would, which some find slightly firmer.
Can two UK singles fit in one room for siblings sharing?
Often, yes. Two beds at 90cm wide each need roughly double our suggested minimum width, plus a walkway between them, so measure your room against two 90 x 190cm footprints before committing. In tighter shared rooms, bunking two singles is the space-saving route, and this mattress suits raised frames.
Where can I buy the Silentnight Comfort Breathe 800 in a single?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so it's worth checking back before you order rather than assuming the price you saw last week still stands. Make sure the listing specifies the UK single, 90 x 190cm.