Luna 4000 Support Gel Memory Pocket Hybrid Super King Mattress
The Luna 4000 Support Gel Memory Pocket Hybrid is a 25cm deep hybrid with a medium to firm feel, combining memory foam over a total of 4,000 springs, made up of 2,000 mini pocket springs sitting above a core of 2,000 full-size Luna Pocket springs.
- Support where your body needs it
- Minimises partner disturbance
- Contours without the heat build-up
£524
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Luna 4000 Support Gel Memory Pocket Hybrid Mattress
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Mattress details
Mattress
Luna 4000 Support Gel Memory Pocket Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Gel
Depth (cm)
25
Layers
4
Layer Details
Luna Fusion Cool Memory Foam
A 2cm layer of memory foam that adapts around your body, which means gentle pressure relief where you need it. Its breathable, open cell structure lets air move through, giving a cooler, fresher feel than standard memory foam.
Reflex Foam
Two 3cm layers of Reflex foam add cushioning for extra comfort, which means a slightly softer landing before you reach the springs. They mould to your body and help keep your spine aligned.
Mini Pocket Springs
A layer of 2,000 mini springs gives a bouncy, comforting feel, so the mattress responds quickly when you change position. Their small size creates pockets of airflow and helps reduce motion transfer between partners.
Luna Pocket Springs
A core of 2,000 Luna Pocket springs, each encased in its own fabric pocket. They respond individually to changes in weight and movement, which means support is distributed exactly where your body needs it.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Space that solves restlessness: With 90cm each for two people sharing, a restless partner is simply further away, and distance does more than any comfort layer can.
- Motion control doubled up: The 2,000 individually pocketed Luna Pocket springs already limit motion transfer, and at this width most movement never reaches your side anyway.
- Room for company: Children padding in at 3am, or a dog who considers the bed his, fit without anyone ending up clinging to the edge.
- Cooler across a bigger surface: The open cell Luna Fusion Cool Memory Foam and airflow through the mini springs matter more here, as two sharers generate plenty of warmth.
- Firm support edge to edge: The medium firm feel stays consistent across the full 180cm, so the person sleeping nearer the side gets the same support as the middle.
This size suits you if...
You share every night and a UK king still feels like a compromise, your partner moves constantly and you want physical distance as well as pocket springs, or children and pets regularly join you and you would all like your own patch. It also makes sense in a large master or period bedroom where a smaller bed would look lost.
Consider another size if...
Your bedroom is under the 3m x 2.9m we suggest as a minimum, or you would rather spend the budget elsewhere. The UK king is 30cm narrower and the same length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
What room size do I need for the Luna 4000 in a UK super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable once you add bedside tables on both sides and wardrobe doors that need to open. Check door swings and landing turns too. This is our guidance rather than Luna's, but it is where the size stops fighting the room.
Is the Luna 4000 super king good for couples with a restless partner?
Yes, and arguably better than any smaller size. The 2,000 Luna Pocket springs respond individually to movement, which reduces what travels across the mattress, and 90cm each means most fidgeting happens too far away to notice. If a partner's movement wakes you in your current bed, the extra width does the heavy lifting.
Is the Luna 4000 super king big enough to share with children or pets?
At 180 x 200cm it is the most realistic size for it. Two adults plus a visiting child, or a large dog with settled habits, can share without anyone hanging off the edge. The medium firm feel also helps here, as the surface stays supportive rather than sagging everyone towards the middle.
Will the Luna 4000 super king fit in an average UK bedroom?
Often not comfortably. Many UK bedrooms sit below the 3m x 2.9m we suggest, leaving little walking space around the frame. If yours is borderline, the UK king is 30cm narrower and the same length, and we suggest at least 2.7m x 2.9m for that size. Measure before you commit, including the route upstairs.
How much does the Luna 4000 super king cost?
Prices change often, so rather than quote a figure that may be out of date, compare the retailers listed on this page: the prices shown here are updated as retailers change them. Super king is the largest size Luna offers, so expect it to sit at the top of the model's range.