Skip to content
We earn advertising and referral fees from many of the brands we rank, and those fees affect where they appear.

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

Sealy vs Sleeping Duck

Sealy is the traditional route: a thick innerspring you lie on in a Harvey Norman showroom, four firmness levels at one price, edge reinforcement on all four sides — and no trial once it is delivered. Sleeping Duck is the opposite approach: you buy it unseen, then tune it at home, including a different firmness on each side, with free pad swaps during the trial. Sleeping Duck costs less and scores higher overall.

Direct Verdict & Recommendation Answer-First Comparison

The Short Answer: Which mattress should you choose?

Sealy is the traditional route: a thick innerspring you lie on in a Harvey Norman showroom, four firmness levels at one price, edge reinforcement on all four sides — and no trial once it is delivered. Sleeping Duck is the opposite approach: you buy it unseen, then tune it at home, including a different firmness on each side, with free pad swaps during the trial. Sleeping Duck costs less and scores higher overall.

  • Price Advantage: Sleeping Duck starts lower at From $999.
  • Cooling & Airflow: Sleeping Duck leads cooling with a score of 8.4/10.
  • Trial Guarantee: Sealy gives No sleep trial vs Sleeping Duck with 100 nights.

Key differences at a glance

Build & Feel

Construction & Alignment

Sealy: Innerspring (Four levels — Firm / Medium / Plush / Ultra Plush)

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

Comfort Scores

Cooling & Motion Transfer

Sealy: Cooling 8.2/10, Motion 7.5/10

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

Purchase Terms

Trial, Price & Warranty

Sealy: From $2,399 · No sleep trial trial · 10 years warranty

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

The differences that matter

Sealy compared with Sleeping Duck
Specification Sealy Sleeping Duck
Entry price From $2,399 From $999 (better of the two)
Sleep trial No sleep trial 100 nights (better of the two)
Warranty 10 years 10 years
Overall score 8.4 9.1 (better of the two)
Cooling score 8.2/10 8.4/10 (better of the two)
Motion isolation score 7.5/10 8.7/10 (better of the two)
Edge support score 9.4/10 (better of the two) 9/10
Firmness Four levels — Firm / Medium / Plush / Ultra Plush Adjustable — Medium / Firm / Half-half
Construction Innerspring Hybrid (Pocket Spring + Foam)
Height / Profile 33 cm 31 cm
Key materials RestSUPPORT 3-stage coil system, UniCased XT edge support, Gel-visco comfort layers, Wool-blend quilt Twice-tempered steel pocket springs, High-density AirGrown polyurethane foams, BreatheTech knitted bamboo cover
Delivery & returns — 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 Sealy if…

You want to test it in person and want a traditional innerspring feel.

Check Sealy price

Choose Sleeping Duck if…

You are comfortable buying online and want to tune the feel — or need different sides for two people.

Check Sleeping Duck price

Pros and cons, side by side

Sealy

Pros

  • Four walls of UniCased XT edge reinforcement, specified by the maker rather than left unstated
  • Four firmness levels at the same price, so choosing the feel costs nothing
  • Stocked in Harvey Norman stores, so you can lie on it before you buy
  • Made in Australia, which Sealy states on the product page

Cons

  • A queen is $3,699
  • No sleep trial, so the showroom is the only chance to test it
  • Sealy does not sell direct; you buy through Harvey Norman
  • The Rosewood build is a Harvey Norman exclusive, so you cannot price-compare it elsewhere

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

Sealy vs Sleeping Duck: Frequently Asked Questions

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

Sealy: Innerspring, firmness Four levels — Firm / Medium / Plush / Ultra Plush. 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: Sealy or Sleeping Duck?

Sleeping Duck scores higher for cooling: 8.4/10 against 8.2/10 for Sealy. 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 Sealy and Sleeping Duck?

Sealy: no sleep trial; 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

Want a third column? Build your own comparison with up to three mattresses.