MLILY Arctic Ortho 1800 Cool Gel Hybrid King Size Mattress
The MLILY Arctic Ortho 1800 Cool Gel Hybrid is a firm hybrid mattress combining gel memory foam with a pocket spring system in a 26cm deep build.
- Firm feel with gel cooling
- Eases pressure at hips & shoulders
- Minimises partner disturbance
£599
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MLILY Arctic Ortho 1800 Cool Gel Hybrid Mattress
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Mattress details
Mattress
MLILY Arctic Ortho 1800 Cool Gel Hybrid Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Hybrid
Orthopaedic
Gel
Depth (cm)
26
Layers
4
Layer Details
Quilted M-Luxe® Gel Memory Foam Cover
A quilted cover with gel memory foam that cushions your pressure points while drawing heat away from your body. In practice, this means the soft, hugging feel of memory foam with less of the warmth it usually brings.
Reflex Foam
A layer of reflex foam that moulds to your body for a contoured feel while remaining breathable. It bridges the softer surface and the springs below, so the transition feels gradual rather than abrupt.
Full-size and Mini Pocket Springs
A combination of full-size and mini pocket springs, with the larger springs targeting your hips and shoulders to encourage good posture. The mini springs fill in around them, which means support is spread precisely across the whole body.
High-Density Support Foam Base Layer
A deep base of Flex Foam that promotes healthy spinal alignment and full-body support. It gives the mattress its stable foundation and contributes to that overall firm feel.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Proper personal space for two: At 75cm each for two people sharing, you can both change position freely without ending up shoulder to shoulder in the night.
- Less disturbance across the width: The mix of full-size and mini pocket springs responds to each of you separately, so an early alarm on one side is less likely to wake the other.
- Extra length for taller sleepers: At 200cm long, the UK king adds 10cm over the UK double, which matters if either of you is approaching six foot.
- Firm support at this scale: The high-density foam base keeps the surface stable edge to edge, so the extra width doesn't come with a saggy middle.
- Cooler nights when sharing: Two bodies generate more heat than one, and the gel memory foam cover is designed to draw that warmth away rather than trap it.
This size suits you if...
You share the bed every night and have outgrown the width of a double, one of you gets up hours before the other and you want that movement absorbed rather than transmitted, or either of you is tall enough that a standard 190cm mattress leaves feet at the edge. It also suits couples whose dog has quietly become a permanent third occupant.
Consider another size if...
Your bedroom can't comfortably take a 150cm wide bed, or you're under our suggested minimum of 2.7m x 2.9m. We'd recommend the UK double instead; allow at least 2.6m x 2.8m for that size.
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FAQ's
Is the UK king Arctic Ortho 1800 worth it over the double?
For most couples, yes. The UK king is 15cm wider and 10cm longer than the UK double, giving you 7.5cm more space each. On a firm mattress like this, that extra width means you can settle into your own zone rather than compromising on position, and the pocket springs keep each side feeling independent.
Will a UK king version of this mattress fit my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, with more feeling comfortable once wardrobes and bedside tables are in. New build master bedrooms can be tighter than they first appear, so measure with your existing furniture in mind before committing.
How big is the MLILY Arctic Ortho 1800 in a UK king?
It measures 150 x 200cm, or 5ft x 6ft 6in, and the mattress is 26cm deep. Standard UK king sheets and a 230 x 220cm king duvet will fit it.
Does the king size reduce partner disturbance on this mattress?
The 1,800 full-size and mini pocket springs move independently, so one sleeper's movement is largely contained to their side. The UK king adds physical distance too, at 75cm each for two people sharing, which helps if one of you leaves for work hours before the other stirs.
Should I size up to the UK super king instead?
The UK super king gives 90cm each for two sharing, 15cm more per person than the UK king, at the same 200cm length. It needs a room of at least 3m x 2.9m though, so it's the better pick only if you have the floor space and genuinely want that extra width.