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Top3 Mattress compares mattresses sold in Australia, and we make our money when a reader buys through one of our links. Brands pay us advertising and referral fees, and those arrangements affect which mattresses we cover and how high they sit in our rankings. Some mattresses here have no arrangement with us at all.

Every mattress is scored against the same ten published criteria, and each of the ten scores is shown alongside the total. What those criteria measure, and how the total is set, are laid out on our How we rate page. The work behind the scores is desk work: we read published specifications, warranty documents and trial terms, and cross-check them against each manufacturer's own pages. We do not buy these mattresses and sleep on them, and no score here comes from in-home testing.

We do not cover every mattress sold in Australia, and the ones we can earn a commission on are more likely to be among the ones we do cover. Prices, trial lengths and warranty terms change without notice, so check the brand's own page before you buy. A ranking here is not a guarantee about a product and not an endorsement of it. Our full terms are set out in the Terms of use.

Head to head

Koala vs Sleeping Duck

Both are built around changing the feel at home rather than returning the mattress. Koala flips between two firmnesses; Sleeping Duck swaps foam pads for medium, firm, or a different firmness on each side. Koala has the longer trial. Sleeping Duck restricts which bases you can use: a sprung or adjustable base, or slats too far apart, voids its warranty.

Direct Verdict & Recommendation Answer-First Comparison

The Short Answer: Which mattress should you choose?

Both are built around changing the feel at home rather than returning the mattress. Koala flips between two firmnesses; Sleeping Duck swaps foam pads for medium, firm, or a different firmness on each side. Koala has the longer trial. Sleeping Duck restricts which bases you can use: a sprung or adjustable base, or slats too far apart, voids its warranty.

  • Price Advantage: Koala starts lower at From $890.
  • Cooling & Airflow: Sleeping Duck leads cooling with a score of 8.4/10.
  • Trial Guarantee: Koala gives 120 nights vs Sleeping Duck with 100 nights.

Key differences at a glance

Build & Feel

Construction & Alignment

Koala: All-foam (Flippable — Medium-firm / Firm (7/10))

Sleeping Duck: Hybrid (Pocket Spring + Foam) (Adjustable — Medium / Firm / Half-half)

Comfort Scores

Cooling & Motion Transfer

Koala: Cooling 7.5/10, Motion 9.4/10

Sleeping Duck: Cooling 8.4/10, Motion 8.7/10

Purchase Terms

Trial, Price & Warranty

Koala: From $890 · 120 nights trial · 10 years warranty

Sleeping Duck: From $999 · 100 nights trial · 10 years warranty

The differences that matter

Koala compared with Sleeping Duck
Specification Koala Sleeping Duck
Entry price From $890 (better of the two) From $999
Sleep trial 120 nights (better of the two) 100 nights
Warranty 10 years 10 years
Overall score 9.2 (better of the two) 9.1
Cooling score 7.5/10 8.4/10 (better of the two)
Motion isolation score 9.4/10 (better of the two) 8.7/10
Edge support score 7.3/10 9/10 (better of the two)
Firmness Flippable — Medium-firm / Firm (7/10) Adjustable — Medium / Firm / Half-half
Construction All-foam Hybrid (Pocket Spring + Foam)
Height / Profile 25 cm 31 cm
Key materials TENCEL Lyocell cover, 7 cm Kloudcell comfort layer, 3-zone high-density support foam, Zero Disturbance technology Twice-tempered steel pocket springs, High-density AirGrown polyurethane foams, BreatheTech knitted bamboo cover
Delivery & returns Free delivery (exclusions apply) Free next business day · most metro, some regional

Scores, pricing, trials and warranties highlight the category leader. Firmness, materials and profile dimensions are listed as individual sleeping preferences rather than absolute winners.

Final recommendation: Which one is right for you?

These two suit different sleepers. Use the criteria below to match your body type, sleeping position and temperature needs to the right choice.

Choose Koala if…

You want a longer trial, or your bed base is sprung or adjustable.

Check Koala price

Choose Sleeping Duck if…

You and your partner want different firmnesses, or you want to keep re-tuning rather than choose once.

Check Sleeping Duck price

Pros and cons, side by side

Koala

Pros

  • Flippable firmness — change your mind without sending it back
  • The 120-night trial includes free returns
  • CHOICE Recommended and ProductReview.com.au awards 2023–2025 — given to the Koala range, not to this model alone
  • All-foam build with Zero Disturbance makes it strong for couples

Cons

  • All-foam, so it runs warmer than a spring hybrid
  • Only five sizes — no Long Single or Super King
  • Three support zones, where Emma, Origin and Newentor use seven
  • At $1,249 for a Queen it is priced well above budget boxed mattresses

Sleeping Duck

Pros

  • Each side can be a different firmness, and a half-half queen costs the same as a single-firmness one
  • Firmness is changed by swapping foam pads at home — free and unlimited during the 100 nights, in soft, medium, firm or extra firm
  • The cover and both foam layers lift out and can be replaced individually, so one worn part does not mean a new mattress
  • A perimeter zone of high-strength steel springs, so the edge holds when you sit on it

Cons

  • A queen is $1,649
  • A 100-night guarantee, the same as Ecosa and shorter than Newentor, Koala, Origin, Onebed and Emma; returns are capped at two mattresses per household
  • Putting it on a sprung or adjustable base voids the 10-year warranty, as do slats more than 12 cm apart
  • The warranty sets a 140 kg limit per sleeper and only counts sagging deeper than 30 mm as a defect

Koala vs Sleeping Duck: Frequently Asked Questions

Is Koala or Sleeping Duck better for back support and spinal alignment?

Koala: All-foam, firmness Flippable — Medium-firm / Firm (7/10). Sleeping Duck: Hybrid (Pocket Spring + Foam), firmness Adjustable — Medium / Firm / Half-half. As a general rule, zoned pocket-spring hybrids push back more under the lower back and hips, while all-foam builds contour more closely around the shoulders and hips. Firmness preference matters as much as construction.

Which mattress sleeps cooler in Australian climates: Koala or Sleeping Duck?

Sleeping Duck scores higher for cooling: 8.4/10 against 7.5/10 for Koala. The cooling score is our assessment of each brand's published materials and construction; we do not run temperature tests.

How do the trial periods and warranties compare between Koala and Sleeping Duck?

Koala: sleep trial 120 nights; warranty 10 years. Sleeping Duck: sleep trial 100 nights; warranty 10 years. Trial conditions such as minimum nights, return fees and delivery areas differ between brands, so read each brand's terms before you buy.

Other match-ups

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