Silentnight Eco Comfort Airmesh 3000 Boxtop King Size Mattress
The Silentnight Eco Comfort Airmesh 3000 Boxtop is a medium-feel pocket spring mattress with a deep 35cm boxtop build.
- Plush quilted top for side sleepers
- Eases pressure at shoulders & hips
- Two cooling layers for hot sleepers
£1,199
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Silentnight Eco Comfort Airmesh 3000 Boxtop Mattress
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Mattress details
Mattress
Silentnight Eco Comfort Airmesh 3000 Boxtop Mattress
Size
Firmness
Medium Soft
Construction
Pocket Spring
Eco-Friendly
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.
Key benefits
- Space to stop negotiating: With 75cm each for two people sharing, one of you can sprawl a little without the other losing their edge of the mattress.
- Pocket springs limit partner disturbance: The 2000 Mirapocket springs move independently, which means a partner getting up hours before you is less likely to wake you.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a real difference if either of you is approaching six foot.
- Soft surface, shared bed: The medium soft boxtop cradles each sleeper separately, so a lighter side sleeper and a heavier partner both get pressure relief on their own half.
- Cooling matters more when you share: Two bodies generate more heat than one, and the Coolmax cover with the Airmesh airflow layer helps that warmth escape rather than build between you.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, you and your partner keep different hours and want less disturbance when one of you gets up early, or one of you is tall enough that feet reach the end of a standard-length mattress.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m and still suits most couples.
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FAQ's
Is the Eco Comfort Airmesh 3000 in a UK king good for couples?
Yes, and arguably it is the size where this mattress works best. The pocket spring core responds to each sleeper individually, so movement on one side transfers less to the other, and 75cm each for two people sharing means the soft boxtop can cradle you both without you rolling together. Lightweight sleepers should note it sits on the softer side of medium.
What room size do I need for this king mattress?
We suggest at least 2.7m x 2.9m for a UK king, which leaves walking room on both sides and space for bedside tables. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor rather than the full room before committing to a 150 x 200cm mattress.
Is a UK king long enough for someone over six foot?
It helps considerably. The UK king is 200cm long, which is 10cm longer than the UK double, so a taller sleeper gains genuine foot room rather than hanging off the end. If length is your main reason for upgrading, the UK king delivers it; the UK super king is the same length, only wider.
Will one of us getting up early wake the other in this size?
Less than you might expect. The 2000 Mirapocket springs plus 1000 mini pocket springs compress individually rather than as one unit, and in a UK king the extra width means your partner's exit happens further from you. Across a pocket spring build at this size, an early alarm on one side is much easier to sleep through.
What sheets fit the king size Eco Comfort Airmesh 3000?
You'll need standard UK king fitted sheets for the 150 x 200cm footprint, paired with a 230 x 220cm king duvet. The one catch is depth: at 35cm, this boxtop build is deeper than many fitted sheets allow for, so look for extra-deep king sheets rather than assuming your current set will stretch.