Sleep soundly with our mattress toppers and underlays

Mattress toppers can transform the quality of your sleep in an instant, making your mattress feel as good as new. With high-loft for lift, low-loft for targeted support and multi-zone for all-round comfort in a range of materials from cotton to memory foam and beyond, finding the best mattress topper for your bed has never been easier. Whether you're searching for that cloud-like feeling or a cooling surface to keep you comfortable when summer strikes, find mattress toppers and underlays that support how you like to sleep. Pair with our mattress protectors and on-trend bedding sets to complete your bedroom for less with Kmart.

Bring comfort back to your bed with our range of mattress toppers

Made to improve the feel of your mattress, our wide range of toppers and underlays provide a comfy layer of added cushioning between you and your bed, so you can sleep soundly each and every night. For a cloud-like look, try high-loft mattress toppers that have the most fill for added cushioning. While ball fibre mattress toppers provide a comfortable layer that contours to the curves of your body. For a firmer feel, look for memory-foam mattress toppers or underlays with more compact cushioning for targeted comfort.

Mattress toppers and underlays to suit your sleep style

Our mattress toppers and underlays also offer features and finishes to support how you like to sleep. For hot sleepers, look for mattress toppers with cooling features like mesh side panels for airflow or cooling gel memory foam to regulate body temperature. After targeted support? Opt for compact mattress underlays with multi-zone targeting systems or a firm memory foam to alleviate pressure points and support spinal alignment for added comfort. These simple additions can make all the difference to your sleep quality and comfort overnight.

Mattress topper and underlay FAQs

What is a mattress topper?

A mattress topper is a removable layer of cushioning that sits directly on top of your mattress for comfort and support. They can be used for cushioning, firmness or to provide features like cooling or pressure relief depending on your needs. Mattress toppers are a popular way to refresh the feel of your bed and improve overall sleep quality without replacing your mattresss.

What is a mattress underlay?

A mattress underlay is a thin, supportive and compact layer of cushioning that is placed directly on top of your mattress to improve stability and support. They often feature multi-zone systems or memory foam to alleviate pressure or assist with spinal alignment for those looking to address more targeted sleep needs.

How to clean a mattress topper?

Typically, mattress toppers can be cleaned by regularly airing them out and vacuumming to remove dust and debris. Then, spot cleaned with a mild detergent and warm water to remove any accidental spills or stains. However, it is recommended to check the care label for specific instructions, as some mattress toppers and underlays can be cleaned using a washing machine, gentle hand wash or a professional clean.