MLILY Arctic Ortho 1800 Cool Gel Hybrid Mattress
Mattress
MLILY Arctic Ortho 1800 Cool Gel Hybrid Mattress
Size
Firmness
Firm
Construction
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.
- 90cm of width each: Two people sharing get 90cm each, which means a partner who turns over frequently is far enough away that you may simply not notice.
- Distance plus spring isolation: The 1,800 full-size and mini pocket springs respond to movement individually, and at this width that isolation combines with sheer distance to keep disturbance low.
- Room for the whole household: When a child wanders in at 3am, 180cm of width means everyone still gets a workable share rather than someone clinging to the edge.
- Cooling for two warm sleepers: The gel memory foam cover draws heat away across the full surface, so two people who both run warm are not fighting over the cooler side.
- Fills a large master properly: At 6ft x 6ft 6in, this size suits period properties and big new build masters where a UK king can look a little undersized.
This size suits you if...
You share the bed with a genuinely restless partner and have realised distance matters more than any comfort layer, your children or a large dog regularly join you at night, or you have a big master bedroom where a UK king would leave the room feeling underfurnished. The firm feel adds to that, since the surface stays supportive right across the 180cm width.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m minimum we suggest, or you sleep comfortably with 75cm each. We'd recommend the UK king instead, which is 30cm narrower and the same length; allow at least 2.7m x 2.9m for it.
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Is the MLILY Arctic Ortho 1800 super king good for restless partners?
It is one of the better cases for this size. The 1,800 pocket springs absorb movement locally rather than transmitting it across the bed, and with 90cm of width each you are physically far enough from a fidgeting partner that most turning goes unnoticed. If disturbance is your main complaint, the extra space does more than any comfort layer could.
What room size do I need for the Arctic Ortho super king?
We suggest a minimum of 3m x 2.9m, which leaves enough clearance to walk around the bed and open drawers. That is our guidance rather than the manufacturer's, and it is a genuine minimum: in a room that size the bed will dominate. Check door swing and any landing turns before ordering, as a 180 x 200cm mattress is awkward to manoeuvre.
Is the super king worth it over the UK king for this mattress?
The UK super king is 30cm wider than the UK king and the same length, which works out at 15cm more width each for two sharing, since the UK king gives 75cm each. If children or pets join you at night, or one of you sleeps restlessly, that difference is noticeable. If neither applies, the UK king is usually enough.
How big is the MLILY Arctic Ortho 1800 in a super king?
It measures 180 x 200cm, or 6ft x 6ft 6in, the largest size UK retailers stock as standard and the biggest this mattress comes in. The 26cm depth is the same across all sizes, so standard super king fitted sheets with a reasonable pocket depth should fit without trouble.
Can a family share the Arctic Ortho super king with children or a dog?
This is where the size makes most sense. With 180cm of width, a child arriving in the night or a large dog settling at the foot still leaves the adults a reasonable share. The firm feel helps too, as the surface stays supportive under different weights rather than sagging towards the heaviest sleeper. Compare the retailers listed on this page for current pricing.