Mlily Haluna Natural Pocket 4000 Double 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
£699.43
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Mlily Haluna Natural Pocket 4000 Mattress in a Box
More available sizes
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
- Shared space in a modest footprint: At 4ft 6in x 6ft 3in, the UK double gives you 67.5cm each when sharing, which is a reasonable amount of room for couples who sleep fairly close.
- Fits most UK bedrooms: We suggest allowing at least 2.6m x 2.8m, so a second bedroom or a first flat can usually take this mattress alongside drawers and a wardrobe.
- Edges you can use: The Airtech border with F-Joint edge support is designed to keep the sides stable, which matters on a UK double where each sleeper is often close to the edge.
- A medium feel for two: A medium rating sits in the middle ground, so a couple with different preferences is less likely to find it too far from what either of them likes.
- Easy to dress: Double sheets and a 200 x 200cm double duvet fit, and both are sold almost everywhere, which keeps things simple if you're furnishing a whole home at once.
This size suits you if...
You share a bed with a partner in an average-sized UK bedroom and want to keep space for bedside tables on both sides, or you're kitting out a guest room for visiting couples, or you sleep alone and like room to stretch out while the cat claims a corner.
Consider another size if...
You and your partner often wake each other or one of you is tall. We'd recommend the UK king instead, provided your room allows at least 2.7m x 2.9m.
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FAQ's
Is the Mlily Haluna Natural Pocket 4000 double big enough for two people?
For most couples, yes. The UK double gives 67.5cm each when two people share, which suits partners who sleep fairly close together. If either of you sprawls, or you're both broad-shouldered, that space can feel a little snug, and the UK king would give you more room.
Will a UK double Mlily Haluna fit in a small bedroom?
Usually. We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m being the comfortable norm if you want bedside tables on both sides plus a wardrobe. Measure your room with the furniture you plan to keep before you compare the retailers listed on this page.
Does the Mlily Haluna Natural Pocket 4000 come smaller than a double?
No. Mlily makes this mattress in a UK double, UK king and UK super king only, so the UK double is the smallest option. If you need a UK single or UK small double for a child's room or a narrow box room, you'll need to look at a different mattress.
Mlily Haluna UK double or UK king: which should I choose?
The UK double is 15cm narrower and 10cm shorter than the UK king, which works out at 7.5cm less each for two sharing. Choose the UK double if room space is tight. The UK king suits taller couples or restless sleepers, and we suggest at least 2.7m x 2.9m for it.
What size sheets and duvet fit the Mlily Haluna double mattress?
Standard double bedding fits the UK double, and a 200 x 200cm double duvet covers it well. The mattress is 30cm deep, so check the pocket depth of your fitted sheets before buying, as some shallower double sheets may not tuck under comfortably.