Luna 4000 Plush Gel Memory Pocket Hybrid Mattress
Mattress
Luna 4000 Plush Gel Memory Pocket Hybrid Mattress
Size
Firmness
Construction
Depth (cm)
25
Layers
5
Layer Details
- Knitted cover. A soft knitted top designed to enhance airflow and breathability. It adds a cosy, slightly plush first impression when you lie down.
- Luna Fusion Cool Memory Foam. A 2cm layer of open cell memory foam, which means it lets heat escape more readily than standard memory foam while still moulding to your shape. It provides that gentle, cradled feel memory foam is known for.
- Reflex Foam. Two 3cm layers of supportive foam that mould to your body and help keep your spine aligned. This is the transition zone between the soft top and the springs below.
- Mini Pocket Springs. Small, individually cased springs that add a layer of fine-tuned pressure relief and reduce motion transfer, which means less disturbance when a partner shifts in the night.
- Luna Pocket Springs. Full-size steel springs sewn into individual fabric pockets, each responding independently to your weight and movement. This is the mattress's main support system, keeping your body properly aligned.
Layer details from mattressonline.co.uk product page, September 2026.
- A shared size that keeps the peace: The mini pocket springs reduce motion transfer, which means when your partner turns over at 3am, less of it reaches your side of the 135cm width.
- Fits the rooms most of us actually have: We suggest at least 2.6m x 2.8m for a UK double, which leaves space for a wardrobe and drawers in a typical British bedroom.
- Softness that works for two body types: The soft to medium feel lets lighter partners and side sleepers sink in comfortably, so a couple with different builds can share without one of them compromising.
- Bedding is never a hunt: Double sheets and duvets are stocked everywhere at every price, a small but real saving if you're furnishing a whole home at once.
- Cooler sharing: Two bodies raise the temperature under any duvet, so the open cell memory foam and breathable knitted cover matter more in a shared double than in a single.
This size suits you if...
You share the bed every night and want the traditional couples' size, or you sleep alone and fancy room to stretch out, perhaps with a dog or cat claiming a corner. It also suits a guest room that hosts visiting couples, and a first flat where the bed has to leave space for a wardrobe and a chest of drawers.
Consider another size if...
You and your partner keep waking each other, or one of you is tall. The UK king is 15cm wider and 10cm longer, and we'd recommend it if your room allows at least 2.7m x 2.9m.
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Is the Luna 4000 in a UK double good for couples?
Yes, with a caveat. At 135 x 190cm it's the standard UK couples' size, and the mini pocket spring layer limits how much movement crosses the bed. The soft to medium feel suits lighter sharers and side sleepers best; a heavier back or stomach sleeper may sink further than is comfortable, whichever size they choose.
How much space does each person get on a UK double?
Two people sharing a UK double get 67.5cm of width each. That's enough for most couples, though noticeably snugger than a UK king, which is 15cm wider than the UK double. If one of you sprawls, or a pet joins you most nights, the extra width is where sizing up pays off.
What room size do I need for the Luna 4000 UK double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That gives you walking space on both sides and, in most rooms, enough left over for bedside tables on each side of the bed, which is where a UK king can start to dominate a smaller bedroom.
Should I get the Luna 4000 in a double or a king?
The UK double suits most couples and most rooms. The UK king is 15cm wider and 10cm shorter is wrong to assume: it's 10cm longer, so it helps taller sleepers as well as restless ones, but it needs a room of at least 2.7m x 2.9m. If your bedroom is average sized, the UK double is the safer fit.
Is the UK double Luna 4000 a good guest room choice?
It's a strong guest room pick. A UK double accommodates visiting couples where a UK single wouldn't, and the soft to medium feel is the sort most occasional guests settle into easily. Double bedding is cheap and widely available too, which helps when you're kitting out a room that's only used a few weekends a year.