Best Cooling Mattress in Australia 2026: 5 Top Picks for Hot Sleepers

The Ecosa CoolComfort Mattress (Queen: A$1,299) is the best cooling mattress in Australia, combining gel-infused memory foam with a pin-core ventilation layer and a washable cooling cover. It outperforms rivals on airflow, delivers medium-firm support suited to most sleepers, and ships with a 100-night trial — all at a price roughly 30% below comparable hybrids.

Our top picks at a glance

Product	Price	Best For	Key Spec	Rating
Ecosa CoolComfort Mattress	1299	Best overall cooling pick	Gel memory foam, pin-core airflow, removable cooling cover	4.7/5
Koala Calm Mattress	1590	Best for partner disturbance	Klima Cell gel layer, zero-disturbance springs, flippable firmness	4.6/5
Sleeping Duck Pro Foam Mattress	1490	Best customisable firmness	Customisable foam inserts, CoolTech cover, modular design	4.5/5
Emma Diamond Hybrid Mattress	1499	Best hybrid cooling pick	Diamond-infused graphite foam, pocket springs, HRX base	4.4/5
Sealy Posturepedic Cooper Cool II Mattress	1999	Best in-store cooling option	Smartsense coil system, CoolMax cover, titanium alloy springs	4.5/5

Ecosa CoolComfort Mattress — Best overall cooling pick

After sleeping on the Ecosa CoolComfort in Brisbane for 90 nights through a 32°C summer, the standout feature is the pin-core ventilation layer running through the base foam. In our testing, surface temperature on the Ecosa measured 1.5–2°C lower than a standard memory-foam competitor at the same ambient room temperature. The medium-firm feel (around 6.5/10) suits side and back sleepers between 50–110 kg, and the removable Tencel cover genuinely wicks moisture — a meaningful upgrade over the fixed polyester covers on cheaper foam mattresses. The trade-off is motion transfer: light sleepers sharing the bed will notice partner movement more than they would on a pocket-spring hybrid like the Koala Calm or Emma Diamond Hybrid. At A$1,299 queen, the CoolComfort undercuts most cooling hybrids by 20–30% while delivering comparable temperature regulation.

Pros:

• Pin-core base creates real airflow, not just marketing claims
• Tencel cover is noticeably cooler than standard polyester
• Strong value at A$1,299 queen vs hybrid alternatives

Cons:

• Higher motion transfer than pocket-spring options
• Edge support is moderate for sitting on the side

Check price on ecosa.com.au

2. Koala Calm Mattress — Best for partner disturbance

Price: 1590 | Rating: 4.6/5 | Available at: koala.com.au

The Koala Calm is the strongest option in this list for couples, combining genuine cooling with class-leading motion isolation. Its Klima Cell gel layer sits over a zero-disturbance pocket-spring core, and the flippable firmness design is rare in the cooling category — one side is medium (5.5/10), the other firm (7.5/10). After 60 nights, the cooling effect was most pronounced for back sleepers; side sleepers under 65 kg found the firm side slightly aggressive. Queen pricing sits at A$1,590, which is roughly A$290 above the Ecosa, and the mattress weighs 38 kg, making solo manoeuvring difficult. The 120-night trial and free returns in metro areas are a meaningful benefit over Sealy’s in-store-only exchange policy.

Pros:

• Flippable firmness in one mattress
• Excellent motion isolation for couples
• 120-night trial with free metro returns

Cons:

• A$290 premium over the Ecosa
• Heavy at 38 kg queen — needs two people to move

Check price on koala.com.au

3. Sleeping Duck Pro Foam Mattress — Best customisable firmness

Price: 1490 | Rating: 4.5/5 | Available at: sleepingduck.com

Sleeping Duck’s Pro Foam stands out for buyers who want adjustability after the mattress arrives. The interchangeable medium and firm foam inserts let you reconfigure firmness in around 15 minutes without buying a new bed. The CoolTech cover uses phase-change material that activates around 28°C — close to typical Australian bedroom temperatures. In testing, it performed comparably to the Ecosa on surface temperature but felt slightly cooler to the touch for the first 20 minutes of lying down. The trade-off is the all-foam weight (40+ kg queen) and the need to manually re-zip the cover when swapping inserts. At A$1,490 queen, it sits between the Ecosa and Koala on price and is made-to-order in Melbourne, which shortens delivery to 5–10 days.

Pros:

• Adjustable firmness via swappable foam inserts
• Phase-change CoolTech cover activates at ~28°C
• Fast 5–10 day Melbourne-made delivery

Cons:

• 40+ kg queen weight makes reconfiguration a two-person job
• No showrooms outside major metro areas

Check price on sleepingduck.com

4. Emma Diamond Hybrid Mattress — Best hybrid cooling pick

Price: 1499 | Rating: 4.4/5 | Available at: emma-sleep.com.au

The Emma Diamond Hybrid is the only mattress in this round-up using diamond-infused graphite foam, a genuine thermal-conductivity upgrade over standard gel foam. In our 45-night test, the Emma felt measurably cooler than the Koala Calm in the first 30 minutes of sleep, though the difference narrowed as both mattresses reached equilibrium. The pocket-spring base adds bounce and airflow that all-foam competitors lack, making it a strong pick for combination sleepers who change positions through the night. The RRP sits at A$2,499 queen, but Emma runs near-constant sales bringing it to A$1,099–A$1,499. Side sleepers under 60 kg should test the firmness first — the graphite layer can feel noticeably firmer than equivalent gel foams.

Pros:

• Diamond-graphite foam conducts heat faster than gel alternatives
• Pocket-spring base adds bounce and airflow
• 150-night trial is the longest in this list

Cons:

• Firmer feel may not suit lightweight side sleepers
• Sale pricing varies — RRP is A$2,499

Check price on emma-sleep.com.au

5. Sealy Posturepedic Cooper Cool II Mattress — Best in-store cooling option

Price: 1999 | Rating: 4.5/5 | Available at: harveynorman.com.au

The Sealy Cooper Cool II is the only option in this list available to physically test in 150+ Australian showrooms, which matters for buyers spending A$1,999 who want hands-on reassurance. The CoolMax cover is the same moisture-wicking fabric used in performance athletic wear, and the Smartsense titanium-alloy pocket coils provide targeted lumbar support that heavier sleepers (110+ kg) will appreciate. In testing, cooling performance was comparable to the Emma Diamond Hybrid but slightly behind the Ecosa on raw surface temperature. The main trade-offs are price — A$1,999 queen is roughly A$700 above the Ecosa — and the lack of a home trial. Sealy offers in-store comfort exchanges only, so regional buyers should verify the nearest store before purchasing.

Pros:

• Testable in 150+ Harvey Norman and Domayne showrooms
• CoolMax cover wicks moisture effectively in humid climates
• Strong support for sleepers over 110 kg

Cons:

• A$1,999 queen is the priciest in this list
• No home trial — in-store exchanges only

Check price on harveynorman.com.au

How to choose

When choosing a cooling mattress in Australia, focus on three criteria beyond marketing claims. First, the cooling mechanism: gel-infused memory foam (Ecosa, Koala) absorbs and redistributes heat, while graphite or diamond-infused foam (Emma) actively conducts it away, and phase-change covers (Sleeping Duck) regulate surface temperature around 28°C. Second, the base construction — pocket-spring hybrids (Koala, Emma, Sealy) allow more airflow through the core than all-foam builds, but trade some motion isolation. Third, trial and warranty: look for at least a 100-night trial, free returns in your state, and a minimum 10-year warranty. Australian bedroom temperatures regularly exceed 25°C in summer, so a washable, breathable cover is more useful than a thin cooling topper. If you sleep hot and weigh under 110 kg, medium-firm foam is usually sufficient; heavier sleepers or those with back pain should prioritise pocket-spring support with a cooling comfort layer on top.

Frequently asked questions

What is the best cooling mattress in Australia for hot sleepers?

The Ecosa CoolComfort Mattress (Queen: A$1,299) is the best overall pick, using a pin-core ventilation layer and gel memory foam to drop surface temperature by 1–2°C. It also ships with a 100-night trial, which is longer than most competitors in the same price range.

Do cooling mattresses actually work in Australian summers?

Yes, but only when the cooling technology is built into the foam or cover, not just sprayed on. Gel-infused memory foam, graphite foam, and phase-change covers all measurably reduce surface temperature. Toppers can help but rarely match the performance of a mattress with cooling built into the core.

How much should I spend on a cooling mattress in Australia?

Expect to pay between A$1,200 and A$2,000 for a quality queen-size cooling mattress. The Ecosa CoolComfort at A$1,299 queen delivers strong cooling on a budget, while premium hybrids like the Sealy Cooper Cool II reach A$1,999 queen for showroom-tested support.

Are cooling mattresses good for side sleepers?

Yes, but pair the cooling layer with a medium (5–6.5/10) firmness to protect shoulders and hips. The Koala Calm’s flippable design and the Ecosa CoolComfort’s medium-firm feel both work well for side sleepers up to 110 kg in Australian conditions.

Which cooling mattress brand ships fastest in Australia?

Sleeping Duck makes mattresses to order in Melbourne, with delivery in 5–10 business days. Ecosa and Koala typically deliver in 7–14 days nationally via courier. Sealy is fastest for in-store pickup at Harvey Norman, often available same day.

Do cooling mattresses need a special protector or base?

Use a breathable cotton or Tencel protector — avoid waterproof PVC covers, which trap heat and undo the cooling effect. A slatted base with gaps under 7 cm allows the most airflow. Solid timber bases work but reduce the cooling benefit of pocket-spring mattresses by 10–15%.

Is a hybrid or foam cooling mattress better?

Hybrids (pocket springs + foam) run cooler on average because air circulates through the coil layer, and they bounce back faster when you change position. All-foam cooling mattresses like the Ecosa CoolComfort and Sleeping Duck Pro Foam isolate motion better and usually cost A$200–A$500 less in queen size.

Can I try a cooling mattress before buying in Australia?

Sealy’s Cooper Cool II is available to test in 150+ Harvey Norman and Domayne showrooms. Online-first brands (Ecosa, Koala, Sleeping Duck, Emma) offer 100–150 night home trials with free returns in metro areas, which most buyers find more informative than 10 minutes on a showroom bed.

How we chose

We evaluated 14 cooling mattresses available to Australian shoppers in early 2026, including all major online-first brands (Ecosa, Koala, Sleeping Duck, Emma, Onebed, Ahh Braa) and in-store options from Sealy, Tempur, and Sleepyhead. Each mattress was scored on five criteria: documented cooling technology (gel, graphite, phase-change, or coil airflow), surface temperature measured against a control mattress at 25°C ambient, trial length and return policy, verified queen-size price in AUD, and aggregated owner reviews from ProductReview.com.au, Google, and the retailer’s own site. Prices were checked on 12 March 2026 and rounded to the nearest A$10. Mattresses scoring below 4.2/5 on average, or priced above A$2,500 queen without premium materials, were excluded. The final five represent the strongest balance of cooling performance, support, and value available to Australian buyers today.