Best Mattress for Kids Australia 2026

Children spend more time asleep than adults — they need more sleep for growth, development, and cognitive function. Yet kids' mattresses are often an afterthought, with many parents defaulting to the cheapest option available. The truth is that a quality mattress that properly supports a growing body matters more for children than it might for adults, who aren't actively developing.

This guide covers what to look for in a mattress for children in Australia, the right size and firmness considerations by age, and the best options currently available.

Why the Right Mattress Matters for Children

Children's spines, hips, and shoulders are still developing. A mattress that doesn't provide proper support during this period can contribute to poor posture habits and musculoskeletal development issues. Children also sleep in more varied positions — they tend to move more than adults and often sleep in unusual postures — which means their mattress needs to accommodate different positions well.

Additionally, children are more sensitive to chemicals and off-gassing from mattress materials. Certifications like CertiPUR-US or OEKO-TEX are more important for children's mattresses than for adults.

Firmness for Children

Babies and Toddlers (0–3 years)

Cot and toddler mattresses should be firm — this is a safety requirement as much as a comfort one. Soft mattresses pose a suffocation risk for infants and very young children. Always choose a firm, flat cot mattress that fits snugly in the cot with no gaps.

Primary School Age (4–12 years)

Children in this age range do well on a medium to medium-firm mattress. Their bodies are lighter than adults, so they don't need as much pushback to maintain alignment, but a mattress that's too soft can affect posture. A medium is generally appropriate.

Teenagers (13–17 years)

By the teenage years, the mattress requirements start to resemble adult needs — firmness preferences depend on sleep position and body weight. Taller, heavier teenagers may need a medium-firm option. Firmness preferences also become more personal at this age.

Mattress Sizes for Children in Australia

• Cot: standard Australian cot size is 130 x 69cm

• Single/King Single: single (92 x 188cm) suits most primary school children; king single (107 x 203cm) provides more room for taller or growing children

• Double: 138 x 188cm — some parents choose this for growing teenagers to avoid replacing too soon

Materials to Look For (and Avoid)

For children's mattresses, material safety is particularly important:

• CertiPUR-US certified foam — tested for harmful chemicals including VOCs, formaldehyde, and heavy metals

• OEKO-TEX certified materials — covers and fabrics tested for harmful substances

• Avoid mattresses without certifications if possible, particularly for younger children

Natural latex mattresses are an excellent option for children — durable, naturally resistant to dust mites, and free from the chemical concerns of synthetic foams.

Best Kids Mattresses in Australia

1. Koala Soul Mate — Best for Kids

Koala's Soul Mate mattress is designed specifically for children and uses their Kloudcell foam with CertiPUR-US certification. It's a medium feel suited to most children's sleeping positions. Available in single and king single.

2. Emma Kids Mattress

Emma offers a purpose-designed kids mattress with child-appropriate firmness zones and certified foam materials. The cover is removable and washable — a practical consideration for children's bedrooms.

3. Sleeping Duck Kids

Sleeping Duck's kids range applies their foam expertise to child-appropriate sizing and firmness. Good materials certification and practical washable covers.

Other Considerations

• Waterproof protector: essential for younger children — choose a breathable version that doesn't trap heat

• Trial periods: even children's mattresses benefit from a trial period to ensure your child is sleeping well on it

• Replacement timing: children's mattresses may need replacing more frequently as body size changes rapidly

Our Verdict

Don't compromise on your child's mattress. A quality, well-certified medium-firmness mattress from a reputable brand is worth the investment for the developmental support it provides. The Koala Soul Mate is our top pick for most Australian children, with Emma and Sleeping Duck also strong options. Always add a waterproof, breathable mattress protector.

Our Top Picks

Quick Comparison Table

Buying Guide: What to Look for in an Australian Mattress

1. Trial Period

Always look for at least 100 nights. Koala (120 nights) and Sleeping Duck (100 nights) offer some of the best trials available. A trial lets you test the mattress through different seasons including Australian summer.

2. Warranty

A 10-year warranty is standard for quality mattresses. Ecosa offers 15 years, which is exceptional. Be wary of brands offering less than 5 years.

3. Foam vs Hybrid

All-foam mattresses offer excellent motion isolation but can sleep warm. Hybrid mattresses use pocket springs under foam, improving airflow significantly — important for Australian summers.

4. Firmness

Medium is most versatile for side and back sleepers. Stomach sleepers generally need firmer. If unsure, Ecosa lets you adjust firmness.