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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

Onebed vs Sealy

Onebed is all-foam, bought online, adjustable between two firmnesses, with a trial you can start immediately and end whenever you like. Sealy is a thick innerspring bought through Harvey Norman: four firmness levels at one price, edge reinforcement on all four sides, and no trial at all. The price gap is large, and so is the difference in what happens if you get it wrong.

Direct Verdict & Recommendation Answer-First Comparison

The Short Answer: Which mattress should you choose?

Onebed is all-foam, bought online, adjustable between two firmnesses, with a trial you can start immediately and end whenever you like. Sealy is a thick innerspring bought through Harvey Norman: four firmness levels at one price, edge reinforcement on all four sides, and no trial at all. The price gap is large, and so is the difference in what happens if you get it wrong.

  • Price Advantage: Onebed starts lower at From $679.
  • Cooling & Airflow: Sealy leads cooling with a score of 8.2/10.
  • Trial Guarantee: Onebed gives 125 nights vs Sealy with No sleep trial.

Key differences at a glance

Build & Feel

Construction & Alignment

Onebed: All-foam (Memory Foam + Auralux) (Adjustable — Medium / Medium-firm)

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

Comfort Scores

Cooling & Motion Transfer

Onebed: Cooling 7.8/10, Motion 9.3/10

Sealy: Cooling 8.2/10, Motion 7.5/10

Purchase Terms

Trial, Price & Warranty

Onebed: From $679 · 125 nights trial · 10 years warranty

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

The differences that matter

Onebed compared with Sealy
Specification Onebed Sealy
Entry price From $679 (better of the two) From $2,399
Sleep trial 125 nights (better of the two) No sleep trial
Warranty 10 years 10 years
Overall score 9.5 (better of the two) 8.4
Cooling score 7.8/10 8.2/10 (better of the two)
Motion isolation score 9.3/10 (better of the two) 7.5/10
Edge support score 7.6/10 9.4/10 (better of the two)
Firmness Adjustable — Medium / Medium-firm Four levels — Firm / Medium / Plush / Ultra Plush
Construction All-foam (Memory Foam + Auralux) Innerspring
Height / Profile 28 cm 33 cm
Key materials Tencel cover, Gel-infused memory foam, Auralux foam, 5-zone high-density support base RestSUPPORT 3-stage coil system, UniCased XT edge support, Gel-visco comfort layers, Wool-blend quilt
Delivery & returns Free Australia-wide (some rural exclusions) —

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 Onebed if…

You want to try it at home with a real right of return.

Check Onebed price

Choose Sealy if…

You want to feel it in a showroom first and edge support matters to you.

Check Sealy price

Pros and cons, side by side

Onebed

Pros

  • The 125-night trial has no minimum stay — you can return it in week one
  • Sagging is covered from 20 mm — a shallow threshold, and one Onebed actually publishes
  • Firmness changes by unzipping the cover and flipping the top layers, not by moving the whole mattress
  • Carries both OEKO-TEX and CertiPUR-US certification

Cons

  • All-foam, so there is no spring layer for edge support or airflow
  • Free delivery carries an asterisk — the site says it may not be available for some rural and remote areas, without saying what it costs instead
  • Only two firmness settings — medium and medium-firm, with nothing firmer
  • The instalment amounts are shown but the provider is never named

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

Onebed vs Sealy: Frequently Asked Questions

Is Onebed or Sealy better for back support and spinal alignment?

Onebed: All-foam (Memory Foam + Auralux), firmness Adjustable — Medium / Medium-firm. Sealy: Innerspring, firmness Four levels — Firm / Medium / Plush / Ultra Plush. 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: Onebed or Sealy?

Sealy scores higher for cooling: 8.2/10 against 7.8/10 for Onebed. 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 Onebed and Sealy?

Onebed: sleep trial 125 nights; warranty 10 years. Sealy: no sleep trial; 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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