Firmness
Medium
Type
Hybrid
Depth (cm)
27
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
10
Price Range
£739 to £1,039
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress suits sleepers who want the contouring of memory foam without the deep sink or the heat. The medium firmness works for most sleeping positions, although those who prefer a firm, supportive surface may find the plush reflex foam layers a little soft for their liking. The dual spring system is the real appeal: individually pocketed springs adapt to your shape and reduce motion transfer, which means you're less likely to feel a partner moving, while the mini springs above add bounce and airflow. If you're buying from Mattress Online, there's a 100-night trial, though you'll need to buy a mattress protector from them to qualify. It's only stocked by one retailer, so shopping around isn't really an option.
Key Features & what's inside
- Luna Fusion Cool Memory Foam. A 2cm layer with an open cell structure, which means better airflow and a cooler feel than standard memory foam. It adapts around your body for a cosy, cradled comfort.
- Reflex Foam. A 3cm layer of reflex foam that adds cushioning. This is part of what gives the mattress its plush feel.
- Reflex Foam. A second, deeper 5cm reflex foam layer continuing that soft cushioning. Together the two layers create the plush surface the name promises.
- Mini Pocket Springs. A layer of 2,000 mini springs sitting between the foam and the main spring core. These add breathability and a gently bouncy feel.
- Luna Pocket Springs. The core of 4,000 Luna Pocket springs, each encased in its own fabric pocket. Every spring moves independently, which means support tailored to your shape and less disturbance from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
There's no single size, so it won't work for a child's room or a small guest bed. Fans of a firm, board-like surface should look elsewhere, as the plush foam layers give a noticeably soft top. And if you like the deep hug of all-foam mattresses, the springy feel here may disappoint.
Luna 6000 Plush Gel Memory Pocket Hybrid Mattress
View all mattresses
How firm is the Luna 6000 Plush mattress?
It's rated medium, with a plush top thanks to the layered reflex and memory foams. That suits most sleepers, particularly side and combination sleepers, although anyone who prefers a properly firm surface may find it a little too soft.
Does the Luna 6000 mattress sleep hot?
It's designed not to. The top layer is Luna Fusion Cool memory foam with an open cell structure to increase airflow, and the mini pocket spring layer adds breathability. If you're a very hot sleeper, a hybrid like this is generally a safer bet than an all-foam mattress.
Does the Luna 6000 mattress come with a trial?
Mattress Online lists a 100-night trial, but this is the retailer's own offer rather than a Luna guarantee, and it requires you to buy a mattress protector from Mattress Online to be eligible. Check the terms before you order.
How many springs does the Luna 6000 have?
6,000 in total: a core of 4,000 Luna Pocket springs, each moving independently in its own fabric pocket, plus a layer of 2,000 mini pocket springs above for bounce and airflow.
What sizes does the Luna 6000 come in?
UK Double, King and Super King, priced from £739 to £1,039. There's no single size, which is a shame for smaller rooms.
Couldn't find an answer to your question? Send us a message