Silentnight Comfort Breathe Plus 2100 Mattress
The Silentnight Comfort Breathe Plus 2100 is a medium-feel pillowtop mattress built around 2,100 springs in total: 1,500 nano springs for contouring and 600 Mirapocket springs for zoned support underneath.
- Soft pillowtop that stays cool
- Nano springs contour to your body
- 60-night trial & 5-year guarantee
£609
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Instead of a traditional foam comfort layer, the Silentnight Comfort Breathe Plus 2100 uses Airloft, which Silentnight says offers 18x more breathability, so it should suit you if you tend to sleep warm. At 30cm deep with a cushiony pillowtop surface, it feels softer on first contact than the medium rating might suggest. It comes with a 60-night trial and a 5-year guarantee when bought from Silentnight directly.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
30
Number of Layers
7
Trial Period (nights)
60
Warranty (years)
5
Price Range
£609 to £1,169
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main reason to choose this mattress is breathability without giving up softness. The Airloft comfort layer is designed as a cooler alternative to foam, and the nano spring layer beneath it adds airflow as well as contouring, which means less of that clammy, sinking feeling foam pillowtops can create. Support comes from 600 Mirapocket springs that move independently, so your hips and shoulders get cushioning while your spine stays aligned. The pillowtop is naturally hypoallergenic, a small but genuine plus for allergy-prone sleepers. It's a medium feel, which suits most sleeping positions, although if you want a firm, supportive edge-to-edge feel this softer top layer won't be for you.
Key features & 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.
Best suited for?
Warm sleepers
The Airloft comfort layer replaces traditional foam and is claimed to be 18x more breathable, which means less trapped heat through the night.
Allergy sufferers
A naturally hypoallergenic pillowtop fabric gives people who are bothered by dust or allergens at night a sensible, softer surface to sleep on.
Couples
The 600 Mirapocket springs sit in individual pockets and respond independently, which helps limit motion transfer when one of you moves around.
Side sleepers
A cushiony pillowtop over a contouring nano spring layer gives hips and shoulders some give, so pressure is eased while your spine stays aligned.
Back sleepers
The medium feel and zoned support from the pocket springs keep your spine aligned while the soft top layer still cushions you.
If you prefer a firm mattress, the medium rating plus a cushiony pillowtop will likely feel too soft, particularly for heavier front sleepers who need to keep their hips from dipping. Pillowtops also can't be flipped, only rotated, so if you like turning a mattress to even out wear, that's off the table here.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Silentnight Comfort Breathe Plus 2100 Mattress
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FAQ's
Is the Silentnight Comfort Breathe Plus 2100 soft or firm?
Silentnight rates it as medium, but the pillowtop surface gives it a softer initial feel than that label suggests. Underneath, 600 Mirapocket springs provide zoned support, so it's soft on top with proper structure below. It suits most sleepers, although those who like a firm surface may find it a little too plush.
How many springs does the Comfort Breathe Plus 2100 have?
2,100 in total: 1,500 responsive nano springs in the comfort layers that contour to your body, plus a 600 Mirapocket spring unit underneath. The pocket springs sit in individual fabric pockets and move independently, which means support where you need it and less disturbance from a partner's movement.
Does the Silentnight Comfort Breathe Plus 2100 sleep hot?
It's built with cooling in mind. The Airloft comfort layer is designed as a more breathable alternative to foam, with Silentnight claiming 18x more breathability, and the nano spring layer adds airflow too. Yes, pillowtops can trap some warmth, but this one is better equipped than most foam-topped designs.
What trial and guarantee comes with the Comfort Breathe Plus 2100?
Bought from Silentnight's own site, it comes with a 60-night trial and a 5-year guarantee, with delivery listed at 14 days. That gives you a couple of months to decide at home, which matters with a medium pillowtop feel that can take some getting used to.
What sizes does the Silentnight Comfort Breathe Plus 2100 come in?
Five UK sizes: Single, Small Double, Double, King and Super King. The mattress is 30cm deep, so check your fitted sheets will stretch to a deeper profile.
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