MLILY Polar 1800 Cool Gel Hybrid 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
£449
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At 26cm deep with layers of reflex foam and mini pocket springs above the main spring core, the MLILY Polar 1800 suits sleepers who want cushioning without sinking too far in. The price is reasonable for a hybrid with so much going on inside. It arrives vacuum packed and rolled, and should be comfortable to sleep on after 48 hours.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
26
Number of Layers
6
Trial Period (nights)
Warranty (years)
5
Price Range
£449 to £649
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
If you're a hot sleeper, this is the headline: the M-Luxe cooling gel-infused quilted cover actively pulls heat away from your body, and the reflex foam beneath is more breathable than traditional memory foam. The double spring system is the other draw. Mini pocket springs sit above a full pocket spring core, each moving independently, which means pressure points like hips and shoulders get targeted support rather than a one-size response. The medium firm feel suits most sleepers, although lightweight side sleepers may find it slightly too firm. It's hypoallergenic and vegan friendly, and Mattress Next Day lists free next day delivery, with a stated MLILY 5-year guarantee.
Key features & 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.
Best suited for?
Warm sleepers
The cooling gel-infused quilted cover draws heat away from your body, and the breathable reflex foam beneath helps avoid that trapped-heat feeling on warm nights.
Couples
Pocket springs that move independently, plus a layer of mini springs above, give each person their own targeted support, and the sizes start at Double.
Combination sleepers
A medium firm feel with reflex foam over mini pocket springs gives cushioning without sinking too far in, so shifting position between back and side feels easy.
Allergy sufferers
The copy describes this mattress as hypoallergenic, which makes it a sensible pick if you want a bed that suits sensitive sleepers.
Eco-conscious buyers
Vegan friendly materials mean those who avoid animal-derived products can choose this hybrid without compromising on its six layers of cushioning and support.
If you prefer a soft, sink-in feel, the medium firm tension here may feel a little unyielding, particularly if you're a lightweight side sleeper. It's also only listed in Double, King and Super King, so single sleepers or those with smaller frames will need to look elsewhere.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
MLILY Polar 1800 Cool Gel Hybrid Mattress
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Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the MLILY Polar 1800 good for hot sleepers?
Yes, cooling is its main focus. The quilted cover is infused with cooling gel that draws heat away from your body, and the reflex foam layers are more breathable than standard memory foam, so heat has somewhere to go rather than building up around you.
How firm is the MLILY Polar 1800 mattress?
It's listed as medium firm. That suits most back and combination sleepers, although lightweight side sleepers may find it slightly too firm for their shoulders and hips.
How many springs does the MLILY Polar 1800 have?
It has 1,800 springs in total, arranged as a core layer of full-size pocket springs with a layer of mini pocket springs above. Each spring moves independently, which means support is targeted to your pressure points rather than spread across the whole surface.
Does the MLILY Polar 1800 come with a guarantee?
The Mattress Next Day listing states an MLILY 5-year guarantee. It's sensible to confirm the guarantee terms with whichever retailer you buy from, as delivery and returns offers can differ between shops.
How long before you can sleep on the MLILY Polar 1800?
It arrives vacuum packed and rolled, and the listing states it should be comfortable to sleep on after 48 hours. That gives the foams and springs time to fully expand to their proper shape.
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