Luna 4000 Support Gel Memory Pocket Hybrid Mattress
Mattress
Luna 4000 Support Gel Memory Pocket Hybrid Mattress
Size
Firmness
Medium Firm
Construction
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.
- Fits where space is tight: At 90cm wide it leaves room for a desk, wardrobe or toy storage, and we suggest as little as 2.1m x 2.8m of floor space.
- Supportive for growing sleepers: The medium firm feel and 2,000 Luna Pocket springs in the core give the steady support children and teenagers tend to need, rather than a soft, sink-in surface.
- Cooler for box rooms: The Luna Fusion Cool Memory Foam has an open cell structure, which means less heat build-up in small bedrooms that warm up quickly.
- Easy, cheap bedding: Standard single sheets and a 135 x 200cm single duvet fit, and single bedding is the most widely stocked of any UK size.
- Full spec, smallest footprint: You get the same 4,000-spring, two-tier construction as the larger sizes, so a guest or child isn't sleeping on a lesser mattress.
This size suits you if...
You're kitting out a child's or teenager's room and want a supportive mattress that will last through growth spurts, you need a guest bed for a spare room that doubles as an office, or you sleep alone in a compact bedroom, loft conversion or first flat where a wider mattress simply wouldn't fit.
Consider another size if...
You're an adult who sleeps alone but likes room to spread out, or two of you will ever share the bed. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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Will the Luna 4000 UK single fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk and mid sleeper frames, so width and length are fine. The thing to check is depth: this mattress is 25cm deep, which is on the taller side for a raised frame, so measure against the guardrail height before buying. Safety guidance usually asks for a clear margin above the mattress surface.
How much room do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single, which gives you room to walk around the bed and open drawers or wardrobe doors. That makes it a realistic fit for box rooms, loft conversions with a narrow usable strip under the slope, and children's rooms where the bed shares space with a desk and storage.
Is the Luna 4000 in a UK single a good mattress for a child or teenager?
It's a sensible choice for older children and teens. The medium firm feel and pocket spring core keep the spine supported rather than letting a light body sink in, and the open cell memory foam runs cooler than standard memory foam. Owners describe it as firm, sometimes firmer than expected at first, so it won't suit a child who wants a squashy surface.
Should I buy the UK single or the UK small double for a teenager?
If the room can take it, the UK small double gives a teenager noticeably more space: it's 30cm wider than the UK single and the same length. We suggest at least 2.4m x 2.8m of floor space for the UK small double. In a smaller room, or with a frame already in place, the UK single is the practical pick.
Where can I find the best price for the Luna 4000 UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so they reflect what you'd actually pay today rather than a headline figure. Since the UK single is the smallest of the five sizes this mattress comes in, it's also the cheapest way into the double-spring Luna 4000 construction.