Mlily Haluna Natural Pocket 4000 Super King Mattress in a Box
The Mlily Haluna Natural Pocket 4000 Mattress in a Box combines a wool and bamboo memory foam cover with a ventilated Bamboo Air Memory Foam layer, which means a plush surface that helps you stay comfortable as you sleep.
- Plush wool & bamboo foam cover
- Ventilated layer helps you sleep cooler
- 42-night trial & 5-year guarantee
£953.14
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Mlily Haluna Natural Pocket 4000 Mattress in a Box
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Mattress details
Mattress
Mlily Haluna Natural Pocket 4000 Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Memory Foam
Pocket Spring
Rolled
Wool
Depth (cm)
30
Layers
5
Layer Details
Wool and bamboo memory foam cover
A quilted cover that blends wool with Bamboo Memory Foam, with a stretch knit finish. It gives the surface a plush feel from the first night.
Bamboo Air Memory Foam
A ventilated memory foam layer that encourages airflow through the mattress. That helps regulate body temperature, so you're less likely to feel trapped heat.
Flex Comfort Foam
A responsive foam layer that adapts to your body contours. It adds cushioning where you need it.
Pocket springs
A double-decked 4000 H-Spring system. It gives all-over contoured support, so the mattress responds to your shape across the bed.
Flex Support Foam
A generous base of custom support foam. It supports the layers above from the bottom up.
Layer details from mlily.uk product page, October 2026.
Key benefits
- 90cm of width each: Sharing the UK super king gives each sleeper 90cm, which means a restless partner's shifting is spread across far more mattress before it reaches you.
- 15cm more each than a king: Compared with the UK king, you each gain 15cm of width at the same 200cm length, so the extra space goes sideways, exactly where couples feel cramped.
- Room for a late-night visitor: When a small child or a large dog joins you, the 180cm width means two adults can usually keep a sleeping position rather than clinging to the edges.
- Supported sides across a wide bed: The Airtech border with F-Joint edge support helps keep the sides stable, which matters on a bed this wide, where people often end up sleeping nearer the edge.
- Cooler foam over a bigger surface: The ventilated Bamboo Air Memory Foam layer encourages airflow, a slight help if two warm bodies, plus perhaps a dog, share the bed.
- Delivered rolled up: It turns up rolled and vacuum sealed, so carrying a 6ft-wide mattress up a tight staircase or round a landing turn is a more manageable job.
This size suits you if...
You share the bed with a partner whose tossing and turning wakes you, your children or a large dog end up in the bed most nights, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m, perhaps a big master in a period house where a smaller bed would look lost.
Consider another size if...
Your bedroom falls short of our suggested 3m x 2.9m minimum. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m and still gives 75cm each.
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FAQ's
Is the Mlily Haluna Pocket 4000 super king big enough for two adults and a child?
For the occasional night visit, yes. The UK super king is 180cm wide, giving each adult 90cm before anyone else arrives, so a small child tucked in the middle usually leaves both of you room to stay put. If children join you every night as they grow, the space will feel tighter, but no standard UK size is wider.
How much extra room does the Haluna super king give over the king?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. Shared between two people, that works out at 15cm more each: 90cm on the super king against 75cm on the king. If you're tall rather than broad, the UK king gives you the same length in a smaller footprint.
What size bedroom do I need for a Mlily Haluna super king?
We suggest at least 3m x 2.9m for a UK super king, and around 3.5m x 3.2m will feel more comfortable once bedside tables are in. In a loft conversion master, measure along the wall with full head height, because the slope often decides where a 6ft-wide bed can actually go.
Will a rolled super king mattress fit up my stairs?
Usually, yes. The Haluna turns up rolled and vacuum sealed, which is far easier to carry round a landing turn than a flat 6ft-wide mattress. At this size the bed frame is often the harder part to get upstairs, so measure the bedroom door swing and the route for the base, then compare the retailers listed on this page.
What sheets and duvet fit the Haluna super king?
You'll need super king fitted sheets and a 260 x 220cm duvet. At 30cm deep, the Haluna needs deep-pocket fitted sheets, so check the pocket depth before buying. Super king bedding costs more than king sets and comes in a slightly narrower range, so factor that in if you're replacing everything at once.