Silentnight Eco Comfort Airmesh 3000 Boxtop Mattress
Mattress
Silentnight Eco Comfort Airmesh 3000 Boxtop Mattress
Size
Firmness
Medium Soft
Construction
Depth (cm)
35
Layers
5
Layer Details
- Coolmax Cover. A soft-touch Coolmax cover wicks moisture away from your body, which means less clamminess on warmer nights. It's the first line of temperature control before you reach the fillings.
- Microquilted Layer. The cover fabric is stitched directly into the filling beneath it, giving that plush, quilted surface feel. You'll notice it as a smooth, slightly pillowy first impression when you lie down.
- Eco Comfort Fibre. A finely packed layer of fibres made from recycled materials adds extra padding that cradles your body. It's where much of the mattress's soft, cushioned character comes from.
- Airmesh. Silentnight's 3D honeycomb Airmesh uses an open structure to let air move through the mattress. In practice, that means heat has somewhere to go rather than building up around you.
- Mirapocket Springs. The core holds 2000 Mirapocket springs alongside 1000 mini pocket springs, all made from durable steel. The mini springs target smaller, harder-to-reach areas like the lower back, so support feels more tailored than a single-spring system.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm each, every night: Two people sharing get 90cm apiece, which means the pocket springs under your side respond to you alone rather than whoever moves first.
- Restless partners lose their power: The 2000 Mirapocket springs limit motion transfer, and at this width there's simply more distance between you, so distance and springs work together.
- Room for midnight visitors: If children or a large dog treat your bed as theirs, 6ft of width means everyone keeps a workable share instead of you clinging to the edge.
- Cooling matters more when sharing: Two or more bodies generate real heat, and the Coolmax cover plus Airmesh layer give that warmth somewhere to go across the full 180cm surface.
- A soft surface at scale: The 35cm boxtop feels plush and cushioned right to the edges, useful when a family spread across the mattress uses all of it.
This size suits you if...
You share the bed every night and want the most space a standard UK size offers, your partner is genuinely restless and you've decided distance is the fix, or children and pets regularly join you and a UK king has started feeling crowded. Your bedroom should measure at least 3m x 2.9m, and around 3.5m x 3.2m is where a super king sits comfortably.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or you sleep alone and the space would go unused. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.
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Is the Silentnight Eco Comfort Airmesh 3000 super king good for couples?
Yes, and arguably it's the size where this mattress makes most sense for two. You each get 90cm of width, the 2000 Mirapocket springs plus 1000 mini pocket springs keep support independent on each side, and the Coolmax cover and Airmesh layer help manage the extra heat two sleepers create.
Will the Silentnight Eco Comfort Boxtop super king fit in my bedroom?
At 180 x 200cm, or 6ft x 6ft 6in, it needs a room of at least 3m x 2.9m by our guidance, with around 3.5m x 3.2m feeling more comfortable. Check door swing and any tight landing turns too; a mattress this wide is the point where staircases start to bite.
Is the super king version worth it over the UK king?
If you share with children or pets, or one of you moves a lot at night, yes. The UK super king is 30cm wider than the UK king and the same length, and that extra width does more for undisturbed sleep than any comfort layer. Solo sleepers rarely need it.
Does a bigger size make this mattress sleep cooler?
Slightly, in practice. The Airmesh layer and Coolmax cover work the same in every size, but at 180cm wide two sleepers sit further apart, so you share less body heat. If you both run warm, the combination of space and airflow here is a genuine help.
What bedding do I need for this mattress in a super king?
Super king fitted sheets sized for 180 x 200cm, and check they're deep enough for the 35cm boxtop build, as standard-depth sheets may pop off the corners. A 260 x 220cm duvet suits this width. Bedding costs more at this size, so factor that in alongside the prices shown on this page.