Full Sleeping Duck Mattress Review

The Sleeping Duck “SD Mach II” mattress is a popular hybrid mattress only available in Australia.

What makes it unique is the fact that it can be easily customized by moving the various layers around.

Not only can they be moved vertically, but they can also be arranged in any way to provide the perfect level of firmness for each partner and each section of the body.

This also means that you won’t need to change the whole mattress if you change your firmness preference. Quite clever.

What Type of Mattress is the Sleeping Duck?

The SD Mach II is a hybrid mattress that encompasses Motherboard, precision firmness pads, memory foam, and natural latex.

It is suitable for those who sleep with a partner and/or have back and shoulder pain.

Initially, the mattress is sold in a medium or firm setting. However, it can be changed during the initial 100-night trial.

sleeping duck mattress

Each side of the mattress can have a different firmness to meet the preference of each sleeper in the bed.

Its ability to solve sleep issues comes in the ability to customize the firmness of the mattress.

If, for instance, you started with a firm choice, and you thought it was too firm during the initial phase of the trial, you can change it to the medium firmness by swapping a layer inside the mattress, and this is free of charge during their 100-night trial.

How Firm is the Sleeping Duck Mattress?

The Sleeping Duck SD Mach II mattress is available, initially, in two firmness levels:

  • Medium 5.5/10
  • Firm: 8/10

During the trial, it can also be customized further to:

  • Soft: 4/10
  • Extra-firm: 9.5/10

Changes to the mattress firmness are absolutely free during the 100 night trial period.

How Many Layers Does the Sleeping Duck Mattress have?sleeping duck mattress layers

The Sleeping Duck mattress has three layers which are as follows:

  • AntiGravity™ Foam, 4 cm
  • Precision Firmness Pads, 6 cm
  • Motherboard, 20 cm

The total height of the mattress is 31 cm (12.2”), and it weighs in at 53 kg for the Queen size.

AntiGravity™ foam is unique to the Sleeping Duck mattress and combines the pressure-relieving property of memory foam with the buoyancy of latex.

Made in Australia, it is specially designed to enhance the feeling of weightlessness on the mattress.

It is produced via pressure expansion rather than any chemical, which further enables it to be 8x more open than latex and memory foam.

Memory Foam Mattress Construction

The BreathTech washable cover encapsulates the mattress and is made of bamboo fabric. What makes this cover a great-quality one is that it’s breathable, can easily take washing machine maintenance, and its material makes the Sleeping Duck Comfort offer unmatched softness, unlike any other mattress.

The great thing about this mattress is that it can be completely customized, including the cover, which forms a critical part of the customization process that users love so much.

The memory foam construction right below the BreathTech cover is an ‘AntiGravity Surface Foam’ with a ‘ComponentAdapt Customisation’ layer underneath. The memory foam makes this a soft mattress, while the ‘ComponentAdapt Customisation’ layer makes the Sleeping Duck a firm mattress. Together they work on the optimal foam firmness with tailored support zones.

The mattress industry rarely offers such customization, which is why the Sleeping Duck is a true value for money.

If you want medium or firm, you can order the firmness adjustment upon purchasing. The best part is that there is a trial period when you get free firmness adjustments to your mattress so that you can get just the right amount of the two foams for the best night’s sleep.

Underneath the ‘ComponentAdapt Customisation’ layer is the Motherboard. This is a layer made of pocket springs to accommodate people of all sizes. No more body aches upon waking up.

Body springs act entirely independently. Reinforced perimeter support made from twice tempered steel springs is there to make the mattress feel solid and responsive and offers excellent spinal support for side sleepers and back sleepers.

How Does the Customization Work?

young woman lying on a futon

As we mentioned earlier, the Sleeping Duck Mattress has an unmatched possibility of customization to your preferences. It can be quickly altered for soft to medium firmness level for the best sleep that both you and your partner can get.

When buying a king-size mattress or even a king single, you can ask for a ‘half-half (firm on one side, and medium on the other) version if you and your partner have different firmness preferences.

There are many different levels of firmness that can be ordered for this mattress online or in-store and if this is your first mattress like this, then consult with their experts to ensure that you get the foam just right.

The additional pieces of foam can be soft, medium, firm, or extra firm. And the best part is that you can order these different foam pieces in different areas of the mattress. So, for instance, your head can lie on a softer area while your back is on a firmer area and so on for every part of your body. That way, you can truly customize your sleeping arrangements with all the free firmness adjustments you get.

This unique adjustability makes this mattress very suitable for those who experience back pain or for those who suffer from a spinal condition. Other mattresses don’t offer this unless costing a fortune, making this the best bed you’ll ever experience. Quite simply, this mattress has you covered no matter what your sleeping needs are.

Comfort and Support

Side sleepers usually suffer from hip and shoulder pressure, while back sleepers have a problem with spinal alignment if not sleeping on the right mattress.

In addition, we have the different versions of firmness and how they affect your sleeping.

Medium Firmness Version

The medium version of the Sleeping Duck Mattress gives you suitable pressure relief and feels well balanced overall. Other mattresses may be slightly firmer when categorized as medium-firm, but the Sleeping Duck Mattress still offers plenty of support.

On the firmness scale from 1 to 10, with 10 being the firmest, this mattress is a 5.5 / 10. To truly get an idea of the firmness scale and how each number feels, you should try out more mattresses and see which range suits you best.

Firm Version

The firm version of the Sleeping Duck mattress is firmer than the medium option. Research and previous experience show that although firmer, the mattress responds well to the body and conforms to your movement throughout the night.

This version doesn’t have so much give to it and supports your body better while maintaining body position well without exhibiting any dipping or sinking.

The firm version is rated as a 7.5 / 10 on the firmness scale.

If neither of these two versions suits your preferences, there are two more that can be ordered for the Sleeping Duck Mattress. The extra firm option is the most suitable for back sleepers, while the soft version has the most give and is most suitable for side sleepers.

Extra-firm Version

The extra firm version is rated as 8.5 / 10 on the firmness scale. Although this is considerably firmer than the previous two, people have different preferences, so the ratings do not necessarily relate to comfort.

Soft Version

The soft Sleeping Duck Mattresses are the most suitable for side sleepers, and they offer a plethora of pressure relief. This version is rated at 4.5 / 10 on the firmness scale.

It is important to note that regardless of the firmness option you pick, the Sleeping Duck Mattress will give you excellent support and pressure-point relief.

The foam layers with the pocket springs in the Motherboard will make this bed a combination of firm and stable with all the softness you require. This way, you are ensured to get an excellent spinal alignment. Also, thanks to the good motion absorbance, this mattress will not let you feel your partner tossing and turning throughout the night.

How is Motion Transfer with the Sleeping Duck SD Mach II Mattress?

Motion transfer occurs when a partner in a bed rolls around or gets in and out of bed.

This is especially prevalent for shift workers.

However, the use of a Motherboard coupled with high-quality foams helps to minimize motion.

This implies that the Sleeping Duck does an excellent job at isolating motion.

The Motherboard ensures that the motion is not transferred laterally through the bed, which implies if your partner moves around, you will certainly not feel it.

Is It Good for Hot Sleepers?

Mattresses work very similar to insulation in the walls – the thicker the insulation, the better job it does of stopping the temperature from escaping.

This implies that mattresses that have foam will be the warmest as the heat your body creates won’t be able to escape through the mattress.

On the other hand, spring-only mattresses will be the coolest.

However, the Sleeping Duck mattress is a hybrid mattress, so it is in-between the warmest foam-only mattresses and the coolest spring-only mattresses.

Does it Have any Smell?

GECA logoYes, there is an initial smell associated with the mattress. However, this usually dissipates within a few nights.

In addition to this, the Sleeping Duck mattress is GECA certified, which is an Australian certification against the use of harmful chemicals and Volatile Organic Compounds emissions.

Does it Need a Base?

The Sleeping Duck mattress is designed to work on any firm flat surface.

If using a slatted base, Sleeping Duck recommends that the distance between the slats must be less than 8 cm.

The reason for this is that the Motherboard needs support to function correctly. Any gaps wider than 8 cm will leave a significant number of springs unsupported, thereby affecting the mattress’s feel and longevity.

What Type of Cover Does the Sleeping Duck Mattress Have?

sleeping duck mattress front

The Sleeping Duck SD Mach II uses a natural bamboo cover (BreatheTech Cover), which is breathable, silky, and antimicrobial—a piece of perfect fabric for the changing bedroom climate.

Bamboo is being used more and more by the health unconscious as it’s a great natural fiber with a very low environmental impact.

Most modern brands are looking at ways to introduce it in their products where it might make sense.

Sleeping Duck Mattress Durability

The Sleeping Duck mattress is verified for use by 2x 140 kg individuals for up to 10 years.

The warranty will replace any failed parts of the entire mattress (at the company’s discretion) if the overall mattress has sagged over 30 mm.

Since the SD Mach II mattress is modular, you can also buy replacement parts if needed at a fraction of the original mattress price.

After a few years, this is ideal if you want to make the mattress feel brand new or if you even want to change the firmness.

Size and Shipping for Sleeping Duck Mattresses

Sleeping Duck offers free shipping to all areas it ships to.

All Sleeping Duck mattresses are approximately 31 cm tall and come in varied sizes.

The weight is heavier than most other mattresses, with their Queen size mattress being 53 kg.

100 Night Sleep Trial

Sleeping Duck offers a unique trial compared to other competitors.

They allow you to change the firmness level of the mattress during the 100 night trial period so that you achieve a night of high-quality sleep.

It is absolutely free of charge to make these changes. However, if you are still unhappy after the changes, they allow you to return the mattress.

They pick this up free of charge.

Sleeping Duck SD Mach II Mattress Warranty

The Sleeping Duck offers a 10-year warranty, and this warranty covers excessive body imprints only.

sleeping duck mattress sideIt states that, in the general course of use, if your body imprint on the mattress is larger than 30 mm deep, they will assess it as a warranty case.

The warranty does not cover changes in firmness preference.

This implies that if, over the course of your use, you find you are not sleeping well due to a firmness or feel issue, this will not be covered by their warranty.

Further, they do not cover any minor manufacturing anomalies, such as a small tear fixed with little hand sewing.

To assess warranty issues, Sleeping Duck requires you to take photos of the issue at hand.

Purchase and Delivery

With the possibility to purchase online and the free shipping feature, the Sleeping Duck Mattress is easy to order and get delivered to your door in a compact box. Since it is very popular in Australia, the mattress is offered continent-wide with free delivery and quick shipping times.

You can also select an option to have your previous mattress removed by the Sleeping Duck team that brings the new Sleeping Duck mattress. They can also unpack your new mattress for you and leave it to gass-off in your bedroom or wherever you desire. They do not offer these services everywhere, so you should look for that option at the checkout.

After unpacking the Sleeping Duck mattress, you should leave it for a few hours to air, and it’ll be ready for a good night’s sleep. Although the manufacturer claims the mattress requires a few short hours, we still recommend always allow a mattress in a box to decompress for 24 hours before sleeping on it.

With its black/grey combination, the aesthetics of the Sleeping Duck Mattress, with its black/grey combination gives off a very modern vibe and makes a strong statement in the bedroom. The ‘SD’ brand label and rubber logo tag ooze sophistication and make the mattress the centerpiece of the room.

How Much Does the Sleeping Duck Mattress Cost?

Since we have an international readership, it’s worth repeating that this mattress is only available in Australia.

At the time of this review, the following are the lowest prices we can find:

At the time of this review, the following are the lowest prices we can find:

The Sleeping Duck Mattress Review- Our Verdict

The Sleeping Duck is a hybrid mattress made up of layers of memory foam, latex, twice tempered steel springs, and coils and can switch firmness levels by unzipping the cover and switching the foam layers.

sleeping duck mattress baseThe custom firmness feature that Sleeping Duck offers makes this mattress the perfect choice for those who have a specific preference for the way they sleep (side, back, front) or those who are looking for specific relief to back or shoulder pain.

With every Sleeping Duck, there is a 100 day trial period. During this time, you can change the firmness of the mattress and/or return the mattress.

All mattresses and firmness changes come with free shipping and free returns to all areas where the company delivers.

You also have a 10-year warranty that will cover any excessive imprints or manufacturing flaws.

The Sleeping Duck SD Mach II mattress is priced slightly higher than its competitors but is well worth the price due to its unique construction and trial possibility.


Ted Wilson

Ted Wilson

Founder and Owner

Ted is the founder and owner of Mattress Guides and is an expert in his field. Ted believes that having the right mattress is key to getting a good night’s sleep and feeling well-rested in the morning.

Updated at November 28, 2021