Simba Hybrid 1500 Pocket Kids Bunk Mattress
The Simba Hybrid 1500 Pocket Kids Bunk Mattress is a slim hybrid designed with bunk beds in mind.
- Helps kids sleep cooler
- Supportive as your child grows
- Sturdy edges for sitting & climbing
£339
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At 16cm deep, the Simba Hybrid 1500 Pocket Kids Bunk Mattress sits low enough to keep your child safely below the guard rail, which is the main reason most standard mattresses don't work on bunks. Inside are 1500 pocket springs and Simbatex® foam, a graphite-infused open-cell foam designed to move heat away from warm little sleepers. Simba describes it as medium in feel. It comes in UK Single only and costs a fair sum for a child's mattress, but the construction is closer to an adult hybrid than a basic foam slab.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
16
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
1
Price Range
£339
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
CertiPUR, BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
If your child sleeps hot, the graphite-infused Simbatex® layer is the standout here: open-cell foam that lets warm air escape rather than trapping it the way traditional memory foam can. The 1500 pocket springs respond to your child's weight independently, which means proper support as they grow rather than a one-note foam feel. Edge support in the high definition foam layer helps the mattress hold its shape at the sides, useful when children sit or clamber on the edge. It's CertiPUR® certified, so free from harmful metals and dyes, and Simba is a National Bed Federation Approved Brand. Mattress Online lists a 100-night trial and free next day weekday delivery, terms specific to that retailer.
Key features & layer details
Cover
A microquilted knitted cover in a criss-cross pattern, made with chemical-free fabrics. The elastane gives it stretch, so it moves with your child rather than pulling tight.
Open-cell Simbatex® foam layer
Graphite-infused foam designed to dispel heat and fight overheating at night. Its open-cell structure offers thirty times more airflow than traditional memory foam, which means less of that clammy, sunk-in warmth.
Spring comfort layer
A mixture of Aerocoil® and Conicoil® springs. These add a responsive, cushioned feel above the main support layers.
High definition Simbatex® foam with edge support
A firmer, high definition foam layer with reinforced edges. That edge support helps the mattress stay stable when your child sits or sleeps near the sides.
Zoned Simbatex® foam support base
A 12cm zoned foam base housing the 1500 pocket springs. This is where the real support comes from, keeping the spine aligned as your child grows.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Bunk beds
The 16cm depth sits low enough to keep your child safely below the guard rail, which is the main reason standard mattresses often don't work on bunks.
Children
This is a bunk-specific single with 1500 pocket springs that respond to your child's weight independently, giving support that suits them as they grow.
Warm sleepers
Graphite-infused open-cell Simbatex® foam offers thirty times more airflow than traditional memory foam, which means less clammy warmth for children who sleep hot.
Allergy sufferers
A chemical-free knitted cover and CertiPUR® certification mean the materials are free from harmful metals and dyes, which suits households wanting a cleaner-made mattress.
This is a bunk-specific single, so it won't suit adults or anyone wanting a double or larger. The slim 16cm profile is a safety feature for bunks, but if you want a deep, plush mattress for a standard bed frame, look elsewhere. It's also single-sided, so you can't flip it to extend its life.
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.
Simba Hybrid 1500 Pocket Kids Bunk Mattress
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FAQ's
Is the Simba Hybrid 1500 Kids Bunk Mattress suitable for bunk beds?
Yes, it's designed specifically for bunks. At 16cm deep it sits low enough to keep your child below the guard rail, and parents in owner reviews on mattressonline.co.uk report it fits bunk beds securely.
How firm is the Simba kids bunk mattress?
The product page describes it as medium. That's a sensible middle ground for children, with 1500 pocket springs and foam layers balancing cushioning and support.
Does the Simba kids bunk mattress come with a trial?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Simba guarantee, so check the terms if you buy elsewhere.
Do you need to flip the Simba Hybrid 1500 bunk mattress?
No. It's single-sided, so there's no need to flip it. The downside is you can't turn it over to even out wear, though you can still rotate it head to toe.
Is the Simba kids bunk mattress safe for children?
It's CertiPUR® certified, meaning it's free from harmful metals and dyes, and the cover uses chemical-free fabrics. It's also fire resistant to BS7177: 2008 for home use, and Simba is a National Bed Federation Approved Brand.
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