Updated
July 17, 2026
Sleep Society is reader-supported, that means if you buy something via a link on this page, we might earn a commission. Thank you kindly.
The Sleeping Duck Mach II is the most customisable mattress sold in Australia. It is a made-to-order pocket-spring hybrid whose middle firmness layer you choose at checkout, swap for free during the trial, and even split down the middle so each partner gets their own feel. That flexibility, plus a premium build, is why it has become one of the most talked-about beds in the country.
It is not cheap, and it is heavy. But if you and your partner disagree on firmness, or you simply want to lock in the exact feel that suits your body, few mattresses give you this much control. In this review we break down how the Mach II is built, how it feels, what it costs across all six sizes, and who should (and should not) buy it.
Sleep Society rating
Sleeping Duck Mach II ★★★★½ 4.8/5
Firmness: Choose Soft, Medium, Firm or Extra Firm (split per side on Queen and up) | Queen: $1,649 | Trial: 100 nights | Warranty: 10 years
How it scores
Quality and perks are best-in-class thanks to the premium hybrid build and free firmness swaps; comfort is excellent once you dial in the right feel; value is fair rather than cheap because you pay a premium for the customisation; ease of use loses a little for the mattress being genuinely heavy to move.
The bottom line
The Sleeping Duck Mach II is the mattress to buy when getting the firmness exactly right matters more than getting the lowest price. You pick your feel at checkout, change it for free during the 100-night trial, and can split it side-to-side so couples stop compromising. It is expensive and heavy, and the polyurethane comfort layers can trap some heat, but for tailored support and couple-friendly flexibility it is one of the best beds sold in Australia.
We assess every mattress on the same five criteria – quality, value, comfort, ease of use and perks – using the brand’s published construction, aggregated owner reviews from ProductReview.com.au and CHOICE, and hands-on assessment of the feel, cover and setup. We re-check pricing on the brand’s live page at each update.
The Mach II suits couples who disagree on firmness (you can split the bed soft on one side and firm on the other), sleepers who want to fine-tune their exact feel, and anyone who values pocket-spring support with the option to change their mind for free during the trial. As a spring hybrid it is a strong pick for our best spring mattress and side sleeper guides. Budget shoppers who already know their firmness, and anyone who wants a light, easy-to-move bed, may be better served elsewhere – start with our best mattress guide.
Deal: No current deal on the Sleeping Duck mattress
"The best mattress I’ve ever slept on. I was nervous buying a mattress online. Sleeping Duck made it so easy.... if I wasn’t 100% happy they would provide a full refund. I had nothing to lose! I no longer wake with a sore neck or back. The mattress is firm and snuggly at the same time. The best night’s sleep ever. Thank you" Adrienne Hamann - SD Mach Review
The Mach II is a 31cm pocket-spring hybrid built around a customisable middle layer. From the top:
The foams are produced in Australia and the mattress is assembled overseas before shipping back. The build is independently tested and certified by Global GreenTag, and the comfort foam is GECA certified. The mattress arrives compressed in a box.
Sleeping Duck Pillow - The pillow is made from the Hyper-Adaptive® foam like that mattress, so that means it’s 8x more open than standard latex and memory foam combinations. So the pillow allows airflow to pass through it, making sure your head stays cool at night.
Because the pillow is a mixture of memory foam and latex you get the best of both worlds. This combination means you'll feel the pressure relief of memory foam and the buoyancy of the latex, creating a sense of weightlessness whilst getting adequate support.
Interested in getting a better pillow? Read: best pillows in Australia.
Origin Mattress
The Best Value for Money Hybrid Mattress In Australia → Origin Mattress
Because you choose the firmness, the feel is whatever you order: Soft cushions the shoulders and hips for side sleepers, while Firm and Extra Firm keep back and stomach sleepers level. The pocket-spring base gives more lift and responsiveness than an all-foam bed, and if your choice is not right you swap the insert for free during the trial.
The multi-zoned pocket springs move independently, so motion transfer is low and a restless partner is unlikely to wake you. Couples can also split the firmness side-to-side so neither compromises.
The bamboo cover and spring airflow help the Mach II run cooler than a dense all-foam bed, but the polyurethane comfort layers do hold some heat, which a minority of owners mention.
There is a mild new-foam smell on unboxing that clears within a day or so in a ventilated room.
| Size | Dimensions (cm) | Price (from) |
|---|---|---|
| Single | 92 x 188 x 31 | $999 |
| King Single | 107 x 203 x 31 | $1,099 |
| Double | 138 x 188 x 31 | $1,349 |
| Queen | 153 x 203 x 31 | $1,649 |
| King | 183 x 203 x 31 | $1,999 |
| Super King | 203 x 203 x 31 | $2,699 |
Type: pocket-spring hybrid · Firmness: choose Soft/Medium/Firm/Extra Firm, split per side on Queen and up · Height: 31cm · Trial: 100 nights · Warranty: 10 years · Prices checked July 2026; Sleeping Duck runs periodic sales, so confirm the current price.
The Mach II starts at $999 for a single and runs to $2,699 for a super king, with a queen at $1,649 and a king at $1,999. That places it at the premium end of the bed-in-a-box market, justified by the pocket-spring build, the free firmness swaps and the split-firmness option for couples. Sleeping Duck rarely discounts day to day but does run periodic sales, so check the live price before you buy.
"Whilst I don't have any diagnosed back/neck issues I do experience some lower back pain and general soreness from time to time and since sleeping on this mattress have not experienced it at all. Extremely comfortable and supportive, I don't even notice when my partner rolls around as much. He too says it's the best! I am sleeping so much better, waking up actually feeling rested and ready for the day! - Tania M. - Sleeping Duck Mattress Review
Deal: No current deal on the Sleeping Duck mattress
Because each Mach II is made to your firmness choice, you select your feel (and, on Queen and larger, whether to split it per side) when you order. Delivery is free Australia-wide, with next-business-day dispatch common from Melbourne and same-working-day options in some metro areas. The mattress arrives compressed in a box; slide it onto your base, remove the plastic and it expands within a few hours. Side handles make it easier to position, though it is heavy enough to be a two-person job.
With a 10-year warranty, a twice-tempered pocket-spring core and Global GreenTag certification, the Mach II is built to last well within the typical 7–10 year mattress lifespan. Rotating it head-to-toe every few months keeps wear even, and because the comfort insert is replaceable, a change in feel over time does not mean a whole new mattress.
Yes. You choose Soft, Medium, Firm or Extra Firm at checkout, and if it is not right Sleeping Duck sends a replacement insert for free during the 100-night trial. No tools are needed to swap it.
Yes. On Queen, King and Super King you can split the mattress so each side runs its own firmness, which is the Mach II’s standout feature for couples.
The bamboo cover and pocket-spring airflow help it run cooler than a dense all-foam bed, but the polyurethane comfort layers hold some heat, which a minority of owners notice.
If you already know your firmness and do not need the split-side feature, a hybrid like the Ecosa or the Emma Diamond can cost less. The Mach II earns its premium when the tailored, couple-friendly firmness matters to you.
Deal: No current deal on the Sleeping Duck mattress
Still deciding? Start with our best mattress in Australia guide.
