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.
- Shared support at 67.5cm each: Two people sharing the UK double get 67.5cm each, and the mix of full-size and mini pocket springs supports each side of the bed independently.
- Fits rooms a king would dominate: At 135 x 190cm, this size usually leaves room for bedside tables on both sides where the UK king would push right up against the walls.
- Cool gel cover on a compact bed: Two bodies in a smaller bed share warmth quickly, so the heat-drawing gel memory foam cover matters more in a UK double than in wider sizes.
- Easy to dress: Standard double sheets and duvets are sold everywhere at every price point, which keeps setup cheap if you're furnishing a room from scratch.
- Firm feel for guests and mixed sleepers: The firm hybrid build suits back and stomach sleepers, a safe middle ground if this double is going into a guest room used by visiting couples.
This size suits you if...
You share the bed every night and want a firm, cooler-sleeping hybrid in the size most UK bedrooms are built around, or you're kitting out a guest room and want a bed visiting couples can share comfortably. It also suits a solo sleeper who likes space to spread out, even with a dog or cat claiming a corner of the mattress.
Consider another size if...
You and your partner both like room to stretch and your bedroom measures at least 2.7m x 2.9m. In that case we'd recommend the UK king instead, which gives 75cm each for two sharing, 7.5cm more each than the UK double.
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Is the MLILY Arctic Ortho 1800 UK double big enough for a couple?
Yes, for most couples. The UK double gives 67.5cm each for two people sharing, and the 1,800 pocket springs respond to each sleeper separately, so a restless partner is less disruptive than on an all-foam bed. Broad-shouldered pairs may feel a little snug, and the UK king gives 75cm each if space allows.
What room size do I need for the Arctic Ortho 1800 in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows bedside tables on both sides and space to walk around the bed. This is our own guidance rather than the manufacturer's, so measure your room and any awkward alcoves before ordering.
Is the UK double the smallest size this mattress comes in?
Yes. The Arctic Ortho 1800 comes in UK double, UK king and UK super king only, so there is no single or small double option. The UK double is 45cm wider than a UK single, which makes it a large choice for a child's room or a narrow box room.
Will a UK double Arctic Ortho 1800 get up tight stairs?
Mlily doesn't publish delivery access guidance for this mattress, so measure any turning staircases in older terraces or tight new build landings before ordering. The mattress is 26cm deep and 135cm wide, a firm hybrid with a spring core, so it won't fold or flex the way a rolled all-foam mattress can.
Should I buy the double or the king in this mattress?
It comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, so it fits where a king would dominate. If your bedroom measures at least 2.7m x 2.9m and you share nightly, the UK king's 75cm per sleeper is the more comfortable long-term buy.