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.
- 90cm each for two sharing: With 90cm each for two people sharing, a fidgety partner can toss and turn on their side of the bed without ever crossing into yours.
- Mini springs plus distance: The mini pocket spring layer already reduces motion transfer, and at this width there's simply further for any movement to travel before it reaches you.
- Space for night-time visitors: When a child pads in at 3am, or the dog treats the bed as routine, a 180cm width means everyone still keeps a workable share.
- A gentle feel across a big surface: The soft to medium feel lets shoulders and hips settle in, so side sleepers on either half get pressure relief without disturbing each other.
- 30cm wider than a UK king: The UK super king is 30cm wider than the UK King and the same length, a difference you notice every night if you currently share a smaller bed.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly join you and a UK king no longer stretches far enough. A larger master bedroom helps: we suggest allowing at least 3m x 2.9m for a UK super king.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you'd struggle to get a 180cm-wide mattress around your landing and doorways. We'd recommend the UK king instead, where we suggest at least 2.7m x 2.9m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
What size room do I need for a super king Luna 4000?
We suggest a room of at least 3m x 2.9m for a UK super king, and that's our guidance rather than Luna's. That leaves space to walk round both sides and open drawers. If your room falls short, the UK king is 30cm narrower and the same length, and we suggest at least 2.7m x 2.9m for it.
Is the Luna 4000 super king good for couples with a restless partner?
It's one of the better setups for it. The mini pocket spring layer sits above the main springs specifically to reduce motion transfer, and with 90cm each for two people sharing there's real distance between you as well. A restless sleeper turning over on their half is far easier to ignore than in a narrower size.
How big is the Luna 4000 in a UK super king?
It measures 180 x 200cm, or 6ft x 6ft 6in in imperial. That's the UK super king standard: 30cm wider than the UK King, 45cm wider than the UK Double, and the same 200cm length as the UK King. You'll need super king sheets and a 260 x 220cm duvet to dress it properly.
Will a super king mattress get up my stairs?
At 180cm wide it's the size most likely to fight you on a tight landing or a sharp turn, so measure door swings and stairwells before ordering. There's a further practical point at this size: owner feedback mentions the Luna 4000 has no side handles, which makes manoeuvring and rotating a mattress this large a two-person job.
Does the Luna 4000 super king suit families sharing with children or pets?
This is the size we'd point families towards. At 180cm across, a child wandering in at night, or a large dog who's claimed a corner, doesn't force either adult to the edge. The soft to medium feel is gentle for smaller bodies too, although heavier back or stomach sleepers may find it lets them sink too far.