MLILY Polar 1800 Cool Gel Hybrid Mattress
Mattress
MLILY Polar 1800 Cool Gel Hybrid Mattress
Size
Firmness
Depth (cm)
26
Layers
6
Layer Details
- M-Luxe Cooling Gel-Infused Quilted Cover. A quilted cover infused with cooling gel that actively draws heat away from your body. In practice, that means a cooler, fresher surface on warm nights.
- Reflex Foam. This layer contours to your body shape in a similar way to memory foam, giving personalised support. It's far more breathable, though, so you shouldn't get that trapped-heat feeling.
- Mini Pocket Springs. A layer of small pocket springs that sits close to your body for a finer level of response. It aims for orthopaedic comfort across every part of you.
- Reflex Foam. A second layer of reflex foam, cushioning the transition between the mini springs and the main spring core below.
- Pocket Springs Core. The main support system, with springs that move independently to target each pressure point individually. This is where most of the mattress's structure and push-back comes from.
- High-Density Support Foam Base Layer. A deep layer of Flex Foam at the base that promotes healthy spinal alignment. It anchors the whole mattress and adds full-body tension relief.
Layer details from mattressnextday.co.uk product page, September 2026.
- Real space for two: At 75cm each for two people sharing, you can both stretch out without negotiating for the middle ground every night.
- Movement stays on their side: The 1,800 pocket springs respond individually, so across a 150cm width one partner shifting position sends very little disturbance across the bed.
- Length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, which stops anyone approaching six foot pressing against the footboard.
- Cooling that suits shared beds: Two bodies generate more heat than one, and the gel-infused cover draws warmth away, which helps when you cannot simply roll to a cooler patch.
- A step up that fits most rooms: You get 15cm more width than a UK double without the floor space a UK super king demands; we suggest at least 2.7m x 2.9m.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you runs hot and the gel cover appeals. It also suits couples on different schedules, since the independent springs mean an early alarm on one side barely registers on the other, and anyone approaching six foot who needs the 200cm length.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, or you sleep alone. We'd recommend the UK double instead, which needs a room of at least 2.6m x 2.8m. If you share with a restless dog, the UK super king gives 90cm each; allow 3m x 2.9m for it.
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Is the MLILY Polar 1800 in a UK king big enough for a couple?
Yes, comfortably for most. At 150cm wide it gives 75cm each for two people sharing, 7.5cm more each than the UK double. Combined with springs that respond individually to each sleeper, that width means you feel your own support rather than your partner's movement, which is the main reason couples size up.
Will the MLILY Polar 1800 king stop me feeling my partner move?
It should reduce it noticeably. The mini pocket springs and main pocket spring core both move independently, so motion from one side does not travel far. Add the 150cm width and there is simply more distance between you, which helps most when one of you gets up hours before the other.
What room size do I need for the MLILY Polar 1800 in a UK king?
We suggest at least 2.7m x 2.9m, which leaves enough space to walk round the bed and open drawers. In a new build master bedroom that can be tighter than it sounds once fitted wardrobes are in, so measure the usable floor rather than the room on the plan.
Is a UK king long enough for someone over six foot?
The UK king runs 200cm long, 10cm longer than the UK double, so a sleeper a little over six foot has clearance rather than toes at the edge. If length is your reason for upgrading, note that the UK super king is the same length; going up again buys width, not extra legroom.
How do I compare prices on the MLILY Polar 1800 king?
Use the live table on this page, which shows current prices for this exact size and is updated as retailers change them. Prices differ by size, so make sure any listing you compare elsewhere is the UK king at 150 x 200cm rather than the UK double or UK super king.