A mattress for kids is built and sized around a growing child’s body rather than an adult’s, usually in single or king single dimensions, with firmness levels and hypoallergenic materials suited to a lighter sleeper who is still developing. Because children weigh less than adults, a mattress that reads as too firm for a grown sleeper often gives exactly the support a child’s spine needs, while an adult-weighted mattress can feel unsupportive underneath a much lighter body, which is the gap the best mattress for kids australia has to offer is built to fill.
Kids mattresses sold in Australia generally fall into a handful of categories. Memory foam mattresses contour to a lighter body and resist dust mites, a common concern for children with allergies. Pocket spring mattresses use individually wrapped coils for support that still works as a child’s weight increases through the primary school years. Bunk-specific mattresses are built to a slimmer profile so they don’t push a sleeper too close to the guard rail or the bunk above. Hybrid designs combine foam comfort layers with a spring base for a middle ground between the two.
A single mattress measures 92 by 188 centimetres (36 by 74 inches), the standard Australian size for a child’s first single bed, while a king single adds 15 centimetres (6 inches) of length for the years before a move to a double. The picks below were assessed on firmness suited to a lighter body, hypoallergenic properties, warranty length, and whether the mattress is built to handle a growth spurt without needing an early replacement.
This guide compares memory foam, pocket spring, hybrid and bunk-specific mattresses sized for single and king single beds. If you’re shopping for your own bed instead of a child’s room, our guide to the best firm mattress in Australia covers adult-sized options rated on firmness and edge support.
Quick Picks
Giselle Green Tea Memory Foam King Single
7-zone green tea memory foam with cooling gel infusion, sized to King Single for the years before a double bed.
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Advwin Single Medium Firm Mattress
Hypoallergenic, dust-mite resistant cover on a coil core, priced as a genuine first-bed option.
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Kid Crafters Boutique Mattress
7-zone pocket springs in Single or King Single, backed by a 15-year warranty and 120-night trial.
CHECK CURRENT PRICEBest Mattress for Kids Australia Compared
| Product | Link | Type | Best For | Key Spec |
|---|---|---|---|---|
| Giselle Green Tea Memory Foam King Single | Check price | Memory foam | Growing kids needing cooling comfort | 20cm, cooling gel infusion |
| Advwin Single Medium Firm Mattress | Check price | Coil spring | Budget first bed | Hypoallergenic cover |
| Kid Crafters Boutique Mattress | Check price | Pocket spring | One mattress through a growth spurt | 15-year warranty |
| Comfort Sleep Back Care Deluxe Bunk | Check price | Full foam | Bunk beds specifically | Lightweight, no spring bounce |
| Sealy Singles Trent II Mattress | Check price | Pocket spring | Older kids nearing adult weight | Australian-made, 10-year warranty |
| Slumberzone Firm Mattress | Check price | Spring | Budget hypoallergenic firm feel | 5-year warranty |
| Felix Memory Foam Mattress | Check price | Memory foam | Kids who prefer a contouring feel | 10-year warranty |
1. Giselle Green Tea Memory Foam King Single – Best for Growing Kids
Seven zones of green tea-infused memory foam sit over a 20cm non-spring core on this mattress, sized to King Single for the years between a first single bed and an eventual move to a double.
The cooling gel infusion keeps the foam from sleeping as warm as a plain memory foam core typically does, useful in a child’s room that doesn’t always get the airflow an adult bedroom does. The medium-firm rating splits the difference between an overly soft cot mattress and a genuinely firm adult bed.
At 20cm it sits slimmer than most of the adult mattresses in our firm mattress guide, which suits a child’s smaller bed frame better than an oversized adult profile would. The five-year warranty covers roughly the years a King Single gets used before a move to a double.
Pros
- Cooling gel infusion offsets memory foam heat retention
- CertiPUR-US and OEKO-Tex certified materials
- Sized specifically to King Single
Cons
- Medium-firm rather than genuinely firm for older, heavier kids
- Non-spring foam core won’t suit every sleep position
Key specs: 20cm profile, memory foam with cooling gel, King Single, 5-year warranty.
CHECK CURRENT PRICE2. Advwin Single Medium Firm Mattress – Best Budget Single
An 18cm profile built on a coil core with a breathable foam top layer, sized to a standard Single for a first bed out of the cot.
The hypoallergenic, dust-mite resistant cover matters more on a child’s mattress than an adult’s, since kids’ bedrooms tend to see more daytime hours spent lying on top of the covers as well as sleeping through the night.
The medium firmness and thinner profile suit a lighter, younger child better than a teenager approaching adult weight, and it costs enough less than the other picks here to make sense as a first mattress that will likely get replaced again in a few years anyway.
Pros
- Hypoallergenic, 99% dust-mite resistant cover
- Breathable foam top layer
- Among the lowest-cost single mattresses on this list
Cons
- Thinner 18cm profile than most other picks here
- Better suited to lighter, younger children than teenagers
Key specs: 18cm profile, coil spring core, Single size, 200kg max load.
CHECK CURRENT PRICE3. Kid Crafters Boutique Mattress – Best for Growth Spurts
Built under a dedicated kids range rather than adapted from an adult mattress, this one uses 7-zone pocket springs under CertiPUR-US certified foam, available in both Single and King Single.
The medium-firm support is designed around keeping a growing spine in a neutral line overnight rather than adult pressure-relief needs, and the King Single option means a family can buy once and skip a mattress change when a child outgrows the Single.
The 15-year warranty is the longest on this list by some margin, reflecting that it’s built to last through most of a child’s time in a single bed. It suits parents who would rather pay once for a mattress sized to grow into than replace a cheaper one twice.
Pros
- 15-year warranty, the longest on this list
- Available in both Single and King Single from one range
- 120-night home trial
Cons
- Costs more upfront than the Advwin or Giselle picks above
- Medium-firm rather than a choice of firmness levels
Key specs: 7-zone pocket springs, CertiPUR-US foam, Single and King Single, 15-year warranty.
CHECK CURRENT PRICE4. Comfort Sleep Back Care Deluxe Bunk – Best for Bunk Beds
Built specifically for bunk beds, this full-foam mattress skips springs entirely, keeping it slimmer and lighter to lift onto an upper bunk.
The lack of spring bounce is a genuine safety consideration on a top bunk, since a bouncier mattress adds height and movement a child doesn’t need several feet off the ground. The full-foam build also means no coil noise carrying through to a lower bunk below.
It’s a purpose-built product rather than a converted single mattress, so it suits families furnishing bunk beds specifically, more than it suits a standalone bed frame where a spring-based option might feel more supportive underfoot.
Pros
- Purpose-built for bunk bed safety and dimensions
- No spring bounce or coil noise
- Lightweight enough to lift onto an upper bunk
Cons
- Feels different to a spring mattress if the child later moves to a standalone bed
- Fewer firmness options than the pocket-spring picks on this list
Key specs: Full foam construction, bunk-bed sizing, lightweight profile.
CHECK CURRENT PRICE5. Sealy Singles Trent II Mattress – Best Australian-Made Single
Sealy’s Trent II brings the same manufacturing quality as the brand’s adult range down to a Single size, built firm rather than soft.
The firm feel suits an older child or early teenager whose weight is approaching adult range, where a softer kids’ mattress can start to feel undersupportive. Australian manufacturing also means consistent quality control across the size run.
It costs more than the Advwin or Giselle single options above, which makes sense for a family expecting a full decade of use out of it rather than replacing it again within a few years.
Pros
- Established Sealy brand quality in a Single size
- Australian-made
- 10-year warranty
Cons
- Firm feel suits older children better than younger, lighter sleepers
- Priced above the budget single options on this list
Key specs: Firm feel, Australian-made, Single size, 10-year warranty.
CHECK CURRENT PRICE6. Slumberzone Firm Mattress – Best Hypoallergenic Budget Pick
A budget-tier firm mattress with a hypoallergenic build, priced well below the Sealy and Kid Crafters picks above while still offering genuine firm support.
The hypoallergenic properties matter for children prone to dust mite allergies or asthma, and the firm rating here is a genuine one rather than firm-in-name-only.
The five-year warranty is shorter than the premium picks on this list, a reasonable trade-off for a mattress priced to be replaced as a child grows rather than kept for a decade. It suits budget-conscious families who still want real firmness and hypoallergenic materials.
Pros
- Genuinely firm rather than medium-firm
- Hypoallergenic materials
- Priced well below the premium picks here
Cons
- 5-year warranty, shorter than the Sealy and Kid Crafters options
- Fewer size options than the range-based picks
Key specs: Firm feel, hypoallergenic, 5-year warranty.
CHECK CURRENT PRICE7. Felix Memory Foam Mattress – Best Memory Foam Pick
A memory foam alternative to the spring-based picks elsewhere on this list, built hypoallergenic and backed by a 10-year warranty.
Memory foam contours more closely around a lighter child’s body than springs do, which some children find more comfortable, though it lacks the bounce and edge support of the pocket-spring options above.
It suits a child who has struggled to settle on a firmer spring mattress and does better on a contouring surface, more than it suits an older, growth-spurt-prone child who needs firmer, more consistent support as their weight increases.
Pros
- Contours to a lighter body more than spring alternatives
- Hypoallergenic
- 10-year warranty
Cons
- Less edge support and bounce than the pocket-spring picks on this list
- Foam can sleep warmer than a spring core
Key specs: Memory foam, hypoallergenic, 10-year warranty.
CHECK CURRENT PRICEHow to Choose a Mattress for Kids
Size the mattress to the bed frame, not just the child’s current height. A Single suits most children moving out of a cot, while a King Single gives extra length for the years before a move to a double, letting a family skip one mattress change entirely.
Match firmness to age and weight, not adult firmness charts. A mattress rated medium-firm on adult firmness scales can be exactly the right support for a child’s much lighter body, so don’t assume a child automatically needs the firmest option on the market.
Prioritise hypoallergenic materials, and consider temperature too. Children spend more unsupervised hours in bed than most adults realise, including daytime play, so dust-mite-resistant covers matter more here than almost anywhere else on this list. If a child tends to sleep hot, a topper built for temperature control, like our guide to the best cooling mattress topper, can help without needing to replace the mattress itself.
Check the warranty length against how long the bed will actually get used. A child in a Single bed for two to three years before a King Single or double doesn’t need the same 15-year warranty as an adult’s forever mattress, though the option is there if a family wants to buy once and be done.
Think about bunk beds separately from standalone frames. A full-foam bunk-specific mattress is built lighter and slimmer for safety reasons. Check the bed frame’s weight and height guidelines before putting a standard spring mattress on an upper bunk.
If your child is closer to teenage size and weight, check adult firmness needs too. Kids approaching adult height sometimes do better on a mattress built for adult body weight than on a range designed for a lighter sleeper, so don’t rule out sizing up early if a growth spurt outpaces the mattress.
Frequently Asked Questions
What size mattress does a child need?
Most children move from a cot straight to a Single mattress, which measures 92 by 188 centimetres. A King Single adds 15 centimetres of length and suits a family that wants to skip an extra mattress change before a child eventually moves to a double.
Should a kids mattress be firm or soft?
Most children do well on a medium-firm to firm mattress, since a lighter body needs less give than an adult’s to stay properly supported. A mattress that reads as medium-firm on adult firmness scales is often the right level of support for a child, rather than the softest option on the shelf.
How often should a child’s mattress be replaced?
A kids mattress typically lasts 5 to 10 years depending on build quality, though a growth spurt or a move from Single to King Single can prompt a replacement sooner. Signs it needs replacing include visible sagging, a musty smell that doesn’t clear after airing, or a child waking up regularly with stiffness.
Are memory foam mattresses safe for children?
Memory foam mattresses are generally safe for children over 12 months old, once they are sleeping in a bed rather than a cot. Look for CertiPUR-US or OEKO-Tex certification, which confirms the foam meets standards for chemical emissions and material safety.
What mattress is best for bunk beds?
Bunk beds generally need a lighter, slimmer mattress than a standalone frame, since a thick or bouncy mattress on the top bunk raises the sleeping height and adds unwanted movement near the guard rail. A full-foam mattress built specifically for bunk use is the safer choice over a converted single spring mattress.
Can a child use the same mattress as an adult?
A child can technically sleep on an adult mattress, but a queen or king built for adult body weight often feels underfoot too soft for a much lighter child, since the support layers are calibrated for heavier loads. A mattress sized and firm-rated for a child’s weight generally gives better spinal support until the teenage years.
Verdict
For most Australian families, the Kid Crafters Boutique Mattress’s 15-year warranty and Single-to-King-Single range make it the safest one-time purchase, while the Giselle Green Tea Memory Foam King Single suits a tighter budget without giving up cooling comfort. Families furnishing a bunk bed specifically should skip the standalone options altogether and go straight to the Comfort Sleep Back Care Deluxe Bunk, built for that exact use case.
