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How to choose the right mattress

What to keep in mind

Choosing the right mattress is a pivotal decision that can profoundly influence your sleep quality and well being. Considerations such as mattress type, size, firmness and materials play a crucial role in meeting individual preferences and addressing specific sleep needs.

The right mattress not only supports the body’s natural contours but also helps alleviate pressure points, promoting a deeper and more restful sleep. A good mattress has an integral role in the sleep equation, so investing in one also means investing in your own physical and mental health.

Buying a mattress online

Online shopping for a mattress has many perks, all while from the comfort of your own home. It allows you to research, compare prices and models and decide at your own pace, without any added pressure from a salesperson. You will find detailed product descriptions, specifications and customer feedback and reviews to help you make a more informed choice.

Buying a mattress online usually includes a hassle free trial period, allowing you to test it in your own time and eliminating the risk of making a rushed decision in a showroom. Some mattresses also come compressed, also known as “mattress in a box”, making for a smooth delivery process and fast setup. At Costco Australia, you can expect a streamlined online shopping experience. With all mattresses listed on our website, the final price includes delivery, so you don’t have to worry about paying a hefty fee. Additionally, should you change your mind for any reason regarding the purchase of your mattress, you can always rely on our Return Policy.

Adjusting to a new mattress

Adjusting to a brand new mattress can be a gradual and individual experience. This is because your own body needs time to adapt to the new feel, not about the mattress itself. Allow yourself a few weeks to break in the mattress and take note of any changes in sleep quality, paying attention to your sleeping positions and spinal alignment.

It can take from 3 up to as much as 90 days to fully adjust, depending on factors such as the kind of mattress you previously owned (what your body is used to), new mattress structure and materials, firmness, etc. Usually, memory foam and hybrid mattresses take a little longer to adapt to, due to the nature and density of the material. With traditional spring mattresses, most people have no trouble adjusting quickly, since they are designed to provide support and adjust to your weight. Still, it can take some time to break in. Latex, used in many higher end models, has generally the shortest breaking in period, depending on whether it is natural or synthetic and if it is a hybrid structure.

Choosing a fridge

The importance of sleep

Quality sleep is essential for overall well-being, impacting physical health, cognitive function and emotional stability. Adequate, restful sleep plays a crucial role in immune system function, memory consolidation and mood regulation.

Choosing a high quality mattress is a key factor in promoting a comfortable and supportive sleep environment. A good mattress will provide proper alignment, reducing the risk of back pain and enhancing sleep quality. It also minimizes sleep disturbance, allowing for uninterrupted rest.

Fridge size and capacity

Mattress longevity

A mattress should be replaced, on average, after 7 to 10 years of use. With that being said, many factors can influence a mattress lifespan. The longevity of a mattress often depends on its design, structure and manufacturing process. High quality mattresses are crafted with durable materials and expert construction, to withstand the test of time.

Regular maintenance, such as rotating your mattress and using a mattress protector, is also important to ensure durability. Many manufacturers also offer extended warranty, so you have a guarantee that the mattress will be free from defects during that period.


Mattress structure

Mattress structure Mattress structure

What are mattresses made of?

Mattresses are designed with the purpose of providing comfort and support for a good night's sleep. The structure of a standard mattress typically consists of several layers, each serving a distinct purpose. The top layer, known as the comfort layer, is often made of materials like memory foam, latex, or polyurethane foam, offering a plush surface for relaxation.

The support layer beneath, also known as the "core" of the mattress, provides the necessary foundation and spinal alignment. It is commonly composed of materials such as innerspring coils, pocketed coils or high density foam, each type catering to specific sleep preferences. Some mattresses also feature a transition layer to enhance the overall feel and responsiveness, which you can learn more about in Mattress features. Each type caters to specific sleep preferences, ensuring a wide range of options for individuals seeking a customised sleep experience.



Latex mattresses are renowned for their breathable, responsive and durable characteristics. Although synthetic latex is available, natural latex is preferred, as it can be a more sustainable and eco-friendly choice made from a substance derived from rubber trees. It also has hypoallergenic properties, making an excellent option for those who suffer from allergies. Overall, latex mattresses provide contouring without the sinking feeling often associated with memory foam. Their open cell structure promotes airflow, helping regulate temperature during sleep. Often appreciated for its longevity, Latex often outlasts other mattress types. You will find that many luxury mattresses contain latex as part of their structure.


Spring mattresses are a traditional and widely used type of mattress that incorporates a coil system as its core support structure. There are two main types of spring mattresses: bonnell coils, which are hourglass shaped and connected with a spiral wire, and pocketed coils, individually encased in fabric pockets.

The structure of a spring mattress features a network of steel coils or springs, strategically placed to provide support and distribute weight evenly across its surface. They offer responsiveness and support, allowing the mattress to adapt to body weight and provide a degree of bounce. While spring mattresses may lack some of the pressure relieving properties found in memory foam or latex mattresses, they are valued for their durability, affordability and the cooling effect created by the natural airflow between the coils.

Memory Foam

Foam mattress models have gained immense popularity over the years. They excel in isolating motion, making them an excellent choice for couples. They also tend to alleviate pressure points, helping with joint or back pain. Some foam mattresses often come with varying firmness levels, catering to a wide range of sleep preferences.

Memory foam, developed by NASA in the 1960s, conforms to the body's contours in response to heat and pressure, providing a personalised and supportive sleep surface that helps alleviate pressure points and evenly distribute weight. While they may retain heat, newer technologies such as gel infused or open cell foam allow for enhanced breathability.


Hybrid mattresses seamlessly blend the best of both worlds, combining the support of traditional innerspring coils with the comfort of modern foam materials. They typically feature an innerspring core, for robust support and responsiveness, along with comfort layers of memory foam, latex or other specialised foams, for added pressure relief and body contouring.

This combination caters to a diverse range of sleep preferences, offering the bounce and breathability of innerspring coils while conforming closely to the curves of the body thanks to the adaptive properties of foam. Due to their versatile design, hybrid mattress tend to be a more expensive option as well as heavier because of the additional materials needed to create them. All in all, a high quality hybrid mattress is sure to provide the ideal balance between support and cushioning.


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Mattress feel

Mattress feel


Soft or plush mattresses are designed to provide an extra cushioned sleep surface for a luxurious sleep experience, or what some might describe as the feeling of “sleeping on a cloud”. These mattresses typically feature comfort layers of soft materials like memory foam, latex or pillowtop constructions, creating a gentle and inviting feel. Because they use multiple layers of cushioning material, plush mattresses tend to cost more.

Soft mattresses excel at relieving pressure points, making them ideal for those who prefer a cradling sensation during sleep. While they offer a plush surface, it’s important to note that excessive softness may not be suitable for everyone, particularly those with back or spinal concerns, as it can compromise proper support. They are usually favored by side sleepers, promoting a restful and cozy night’s sleep.



As the name suggests, medium mattresses are perfect for those who are looking for both cushioning and support, striking a harmonious balance between softness and firmness. They cater to a wide audience, being the most popular choice for mattress feel.

A medium feel offers adequate support for spinal alignment while ensuring a comfortable sleep experience. That can be achieved with the combined use of different materials such as memory foam, latex or innerspring coils. They are well regarded for their versatility, especially among couples, accommodating various sleep preferences and suitable for back sleepers, side sleepers and combination sleepers.



Firm mattresses are designed to provide robust support with minimal surface give, catering to those who prefer a sturdier feel during sleep. Typically incorporating materials such as high density foam or a dense innerspring coil system, these mattresses prioritise maintaining spinal alignment.

A firm feel is often recommended for back sleepers and stomach sleepers, as well as those who suffer from lower back pain, as the firmer surface can prevent excessive sinking and promote proper posture. While firmness preferences vary, people seeking a solid and supportive foundation without sacrificing comfort find firm mattresses to be a beneficial choice.


Comfort levels and sleeping positions

Choosing the right mattress feel and comfort level is closely tied to one’s preferred sleeping position. Personal comfort and factors such as body weight and individual preferences can influence your choice, but ultimately it is crucial to narrow down what are the best options for body support based on your sleeping habits. Sleeping on a mattress that doesn’t offer the right support and spinal alignment can contribute to back and joint pain and poor quality sleep.

Back sleeper position

Back sleepers often find medium to medium-firm mattresses beneficial, providing a balance of support and comfort while maintaining an ideal alignment.

Stomach sleeper position

Stomach sleepers need a mattress on the firmer side, as sagging can provoke neck and back pain and improper spinal alignment. A firm mattress will also prevent the feeling of sinking into the mattress.

Side sleeper position

For side sleepers, a softer mattress is generally preferred, as it allows for the hips and shoulders to sink comfortably, reducing the stress on those pressure points.


Mattress features

Mattress features Mattress features

Cooling features

Temperature plays a crucial role in overall sleep quality. Overheating can lead to restless sleep, night sweats and insomnia, leaving you tired and uncomfortable. For that reason, some mattresses feature cooling technologies to help regulate your body temperature during sleep.

Mattresses with an advanced cooling system aim to regulate temperature for optimal comfort. Adding layers of gel infused memory foam, open-cell foam, pocket springs and cooling fabrics helps increase airflow and dissipate heat, maintaining a consistent temperature throughout the night for a cooler sensation and less disturbance.

Posture alignment

Some mattresses offer extra features designed to promote optimal spinal alignment during sleep. These innovative features often include targeted support zones that correspond to different parts of the body, such as the lumbar region.

By maintaining a neutral spine position, these mattresses help alleviate pressure points and reduce discomfort, allowing for a more restful and supportive sleep environment. Additionally, posture alignment features contribute to better overall sleep quality, improving issues such as back pain and bad posture.

Motion transfer

Mattresses with advanced motion transfer features excel in isolating movement, making them ideal for shared sleeping spaces. These mattresses employ innovative technologies such as individually wrapped coils or memory foam to absorb and minimise the impact of motion.

By reducing motion transfer from one side of the bed to the other, you and your partner can enjoy undisturbed, peaceful sleep all night. This is particularly beneficial for couples with different sleep schedules or for light sleeper who are more sensitive to movement.

Edge support

High quality mattresses often incorporate reinforced edges to prevent sagging or rolling sensation when sitting or lying near the mattress perimeter, enhancing overall stability.

The presence of robust edge support ensures a consistent and well supported sleep surface from centre to edge, promoting a sense of security and maximising the usable area of the mattress. Whether getting in and out of bed or simply enjoying a wider sleep area, mattresses with reliable edge support contribute to a more comfortable sleeping experience.


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