Firmness
Firm
Type
Hybrid
Depth (cm)
26
Number of Layers
4
Trial Period (nights)
Warranty (years)
5
Price Range
£499 to £699
Best Sleeping Position(s)
Certifications
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress makes most sense if you want firm support and cooler nights in one package. The gel memory foam and reflex foam layers mould to your shape while staying breathable, which means you get pressure relief at the hips and shoulders without the trapped-heat feeling foam mattresses sometimes cause. The 1,800 pocket springs, a mix of full-size and mini springs, respond to different parts of your body separately, so a restless partner is less likely to disturb you. At £499 to £699 depending on size, it sits at a reasonable price for a hybrid of this depth. The listing at Mattress Next Day states an MLILY 5 year guarantee, and the mattress carries fire resistance certification to the BS7177: 2008 domestic standard.
Key Features & what's inside
- 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.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it presses uncomfortably at the shoulder rather than letting them sink in. It is also not available in a UK Single, so it will not suit anyone shopping for a smaller bed. If you prefer a soft, enveloping feel, look elsewhere.
MLILY Arctic Ortho 1800 Cool Gel Hybrid Mattress
How firm is the MLILY Arctic Ortho 1800 mattress?
It is rated firm. That suits back and stomach sleepers who need their hips kept level, and heavier sleepers who sink further into softer surfaces. Lightweight side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder.
Does the MLILY Arctic Ortho 1800 come with a trial period?
The Mattress Next Day listing we sourced does not state a trial period for this mattress. If a sleep trial matters to you, check the terms with whichever retailer you buy from before ordering.
What guarantee does the MLILY Arctic Ortho 1800 have?
The Mattress Next Day listing states an MLILY 5 year guarantee. As with any guarantee, it is sensible to confirm the exact terms at the point of purchase, since coverage details can vary between retailers.
Is the MLILY Arctic Ortho 1800 good for hot sleepers?
It is designed with hot sleepers in mind. The quilted cover uses gel memory foam that draws heat away from the body, the reflex foam layer is breathable, and the pocket spring core allows air to move through the mattress more freely than an all-foam design would.
How many springs does the MLILY Arctic Ortho 1800 have?
It has 1,800 springs, a mix of full-size and mini pocket springs. The full-size springs target your hips and shoulders, while the mini springs provide more precise support across the rest of the body. Each spring moves independently, which helps limit partner disturbance.
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