Silentnight Comfort Breathe Plus 2100 Mattress
Mattress
Silentnight Comfort Breathe Plus 2100 Mattress
Size
Firmness
Construction
Depth (cm)
30
Layers
7
Layer Details
- Pillowtop sleep surface. A cushiony pillowtop in a naturally hypoallergenic fabric, which means immediate softness the moment you lie down. It's also a sensible choice if dust or allergens bother you at night.
- Comfort Breathe+. An Airloft comfort layer that Silentnight positions as a cooler, cocooning alternative to traditional foam, claiming 18x more breathability. In practice that means pressure-relieving softness with less heat build-up than a standard foam layer.
- 1500 nano springs. A layer of 1,500 ultra responsive nano springs that contour to your body. Because springs allow air to move where foam can't, this layer also helps the mattress breathe.
- Spring insulator layer. A polyester insulator layer with enhanced breathability, sitting between the comfort layers and the main spring unit. It keeps the layers above from settling into the springs below.
- 600 Mirapocket spring unit. 600 Mirapocket springs sit in individual pockets and respond independently to movement, which means zoned support and better spinal alignment. It also helps limit motion transfer if you share a bed.
- Protective Layer. This layer disperses pressure from the spring unit across the mattress. The aim is a longer usable life rather than any change to how it feels.
- Durable case. A soft, durable outer case designed to keep the mattress comfortable for years. It's the housekeeping layer rather than a comfort feature.
Layer details from silentnight.co.uk product page, September 2026.
- Space that does the work: With 90cm each for two people sharing, most disturbances simply happen too far away to wake you, whatever your partner is up to.
- Motion isolation, doubled up: The 600 Mirapocket springs respond independently, and at this width their movement rarely travels far enough to reach the other side of the bed.
- Cooler with more bodies in it: The Airloft comfort layer and 1,500 nano springs let air move where foam traps it, useful when children or pets add extra warmth.
- Room for the whole household: If little ones wander in at 3am, a 180cm width means everyone keeps a workable share rather than someone ending up on the edge.
- A medium feel across a big surface: The cushiony pillowtop gives immediate softness wherever you land on it, which matters more when you have this much surface to spread across.
This size suits you if...
You share the bed every night and want enough distance that a restless partner stops being your problem, your children or dog treat your bed as communal territory and you'd rather plan for it than fight it, or your master bedroom is large enough that a smaller size would look lost in it.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or you'd rather spend less on bedding and frames. We'd recommend the UK king instead: it's 30cm narrower but the same length, and needs at least 2.7m x 2.9m.
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Is the super king Comfort Breathe Plus 2100 much bigger than the UK king?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. That extra width all goes into personal space: 90cm each for two people sharing. If your room can take it, the difference on a shared bed is noticeable every single night.
What room size do I need for the Comfort Breathe Plus 2100 in a super king?
We suggest at least 3m x 2.9m, which gives you walking space on both sides and room for bedside tables. That's our guidance rather than Silentnight's, and it's a genuine minimum. In a smaller room the bed will dominate, and you'll feel it every time you make it.
Is this mattress good for couples where one partner is restless?
Yes, and the super king is the size where it shows most. The 600 Mirapocket springs move independently, so a fidgeting partner disturbs less of the mattress, and with 90cm of width each, whatever movement remains happens a long way from you. Distance plus pocket springs is a strong combination.
Does the super king suit families who end up sharing the bed?
It's the most practical size for it. At 180cm wide, a child climbing in at night doesn't force anyone onto the edge, and the breathable Airloft layer and nano springs help with the extra warmth more bodies bring. The pillowtop is naturally hypoallergenic too, a small bonus with pets around.
Where can I buy the Comfort Breathe Plus 2100 super king at the best price?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so checking the live table is more reliable than any figure we could print. Stock for larger sizes can shift more than smaller ones, so it's worth a look before you decide.