MLILY Polar 1800 Cool Gel Hybrid Super King Mattress
The MLILY Polar 1800 Cool Gel Hybrid is a medium firm hybrid built around 1,800 pocket springs and a cooling gel-infused cover, which means you get sprung support with a surface designed to draw heat away from your body.
- Cooling gel cover pulls heat away
- Mini springs target hips & shoulders
- Medium-firm feel suits most sleepers
£649
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MLILY Polar 1800 Cool Gel Hybrid Mattress
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Mattress details
Mattress
MLILY Polar 1800 Cool Gel Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Hybrid
Gel
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.
Key benefits
- 90cm each for two: With 90cm each when sharing, you get 15cm more per person than in the UK king, which means a stray elbow or a late turn stays on its own side.
- Movement stays near its source: The pocket springs move independently, so across a 180cm span a partner's tossing is absorbed close to them rather than travelling over to you.
- Space for a child or a dog: When a small child or a large dog settles between you, the extra width means both adults keep a proper share instead of clinging to the edges.
- Cooler when the bed is busy: More bodies in one bed means more heat, and the gel-infused cover is designed to draw warmth away from you, which helps on crowded nights.
- In proportion in a large room: In a period property or a spacious master bedroom, the UK super king fills the floor sensibly where a UK king can look slightly lost.
This size suits you if...
you share with a partner who tosses and turns, children or a dog regularly end up in your bed, or your bedroom comfortably clears our suggested 3m x 2.9m minimum.
Consider another size if...
your room falls short of 3m x 2.9m, or a tight door swing leaves little clearance around the bed. We'd recommend the UK king instead, for which we suggest at least 2.7m x 2.9m.
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FAQ's
Is the MLILY Polar 1800 UK super king big enough for two adults and a child?
The UK super king gives two adults 90cm each, the same width as a UK single per person. A small child between you will take some of that, but it's a far gentler squeeze than in a UK king, where each adult starts with 75cm.
MLILY Polar 1800 super king vs king: how much difference does the extra width make?
The UK super king is 30cm wider than the UK king and the same length, which works out at 15cm more each for two sharing. If your partner is restless or pets join you, that margin is noticeable. If neither applies, the UK king is the easier fit for most rooms.
Does the MLILY Polar 1800 UK super king help with a restless partner?
Distance does most of the work here. With 90cm each, a partner who shifts around is simply further away, and the independently moving pocket springs keep much of that motion on their side. A very heavy sleeper turning sharply may still be felt a little.
How much more room does the MLILY Polar 1800 super king give than a double?
The UK super king is 45cm wider and 10cm longer than the UK double. For two people sharing, that means 22.5cm more width each, which is a real change if you currently wake whenever your partner moves.
Where should a UK super king go in a loft conversion bedroom?
The sloping ceiling usually decides it: put the headboard against the tallest wall so you can sit up without stooping. You'll need clear floor for the full 180 x 200cm footprint too, and we suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable.