Silentnight Healthy Growth Lunar Eco Memory Mattress
The Silentnight Healthy Growth Lunar Eco Memory Mattress is a firm hybrid designed for children, available in a UK Single.
- Firm, head-to-toe support
- Contours without memory foam
- 60-night trial & 5-year guarantee
£299
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The Silentnight Healthy Growth Lunar Eco Memory Mattress combines EcoMemory Fibres™, which gently cocoon a child's body shape, with Miracoil® springs for head to toe support. At 23cm deep it's a proper full-height mattress rather than a slim children's option. It's hypoallergenic and made without foam or FR chemical treatments, which many parents will find reassuring. Silentnight backs it with a 60-night trial and a 5-year guarantee, so there's time to see how your child settles on it.
Mattress specifications
Firmness
Firm
Type
Hybrid
Depth (cm)
23
Number of Layers
5
Trial Period (nights)
60
Warranty (years)
5
Price Range
£299
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes sense if you want firm, consistent support for a growing child without memory foam. The EcoMemory Fibres™ offer a softer feel at the surface, while the Miracoil® springs beneath are described by Silentnight as scientifically proven to improve spinal alignment and posture. Breathability runs through the design, from the quilted sleep surface to the border, which means less overheating for children who run warm at night. Being free of foam and FR chemical treatments, and naturally resistant to allergens, it suits families keen to keep chemical treatments out of the bedroom. It isn't the cheapest children's mattress, but the construction and 5-year guarantee help justify the price.
Key features & layer details
Quilted sleep surface
A sumptuous quilted sleep surface that is highly breathable, which means it helps regulate body temperature through the night. Silentnight says this promotes a more refreshing sleep.
Comfort layer
A highly breathable comfort layer sits beneath the quilting. It adds a little cushioning between your child and the fibres below.
EcoMemory Fibres™
Breathable EcoMemory Fibres™ cocoon the child's body shape as they sleep. You get a gentle, contouring feel without traditional memory foam.
Miracoil® springs
Miracoil® springs offer head to toe support, which means even support across the whole mattress rather than just the middle. Silentnight states they are scientifically proven to improve spinal alignment and posture.
Border
A highly breathable border finishes the construction. It allows air to move through the sides of the mattress.
Layer details from silentnight.co.uk product page, September 2026.
Best suited for?
Children
Made as a child's mattress, it pairs EcoMemory Fibres that cocoon a growing body with Miracoil springs for head to toe support.
Allergy sufferers
Hypoallergenic and naturally resistant to allergens, with no foam or FR chemical treatments, so it suits families wanting a cleaner sleep environment for their child.
Warm sleepers
Breathable materials run from the quilted surface through to the border, which means air can move through and children who run warm should overheat less.
Eco-conscious buyers
Fibre replaces traditional memory foam and there are no FR chemical treatments, which suits parents keen to keep chemicals out of the bedroom.
It's only available in a UK Single, so it won't work for double beds or adult use. The firm feel may also be a little too solid for very lightweight children who prefer a softer, more cushioned surface. And if you specifically want memory foam, this uses fibre instead.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Silentnight Healthy Growth Lunar Eco Memory Mattress
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FAQ's
Is the Silentnight Healthy Growth Lunar mattress firm or soft?
Silentnight rates it as firm. The EcoMemory Fibres™ soften the surface feel slightly by cocooning your child's body shape, but the overall support underneath is firm.
Does the Silentnight Healthy Growth Lunar mattress have a trial period?
Yes. Silentnight offers a 60-night trial, so your child can sleep on it at home before you commit. It also comes with a 5-year guarantee.
Is the Silentnight Healthy Growth Lunar mattress chemical free?
It's made without foam or FR chemical treatments, and it's hypoallergenic and naturally resistant to allergens. That makes it a reassuring option if you're cautious about chemical treatments in a child's bed.
How deep is the Silentnight Healthy Growth Lunar mattress?
It's 23cm deep, so it's a full-height mattress rather than a slim children's one. Standard UK Single fitted sheets should fit without trouble.
How long does delivery take for the Silentnight Healthy Growth Lunar mattress?
Silentnight lists delivery within 14 days. It's slower than next-day options, but reasonable for a full-size hybrid mattress.
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