Mattress toppers and underlays for an extra layer of comfort

Refresh the feel of your bed with a mattress topper or underlay that adds another layer between you and your mattress. From high-loft toppers with extra cushioning to memory foam and more compact underlays, Kmart has options to suit different sleep preferences. Start with your mattress size, then consider the feel, material and depth of the topper. Remember to check that your fitted sheets will accommodate the combined depth of your mattress and topper.

Choose a mattress topper for the feel you prefer

Think about what you want to change about the feel of your bed. High-loft mattress toppers add a fuller layer of cushioning, while memory foam toppers provide a more compact feel. Fibre-filled and other topper constructions give you more options to compare, so check the individual product description for materials, loft and care information.

A mattress topper is designed to complement the mattress underneath rather than replace it. If your mattress itself needs updating, browse bed mattresses to compare your options.

Get the right mattress topper size

Match your topper or underlay to your mattress size and compare the exact product dimensions before choosing. Check its depth too, as adding a topper increases the overall height of your sleep surface.

Make sure your fitted sheet can comfortably cover both layers without pulling away from the mattress. If you need to update your linen, explore bed sheets and compare the fitted-sheet dimensions with your complete setup.

Care for your mattress topper

Cleaning requirements depend on the topper's materials and construction. Regular airing may form part of the care routine, while some products may allow spot cleaning, hand washing, machine washing or professional cleaning. Always check the individual care label before cleaning, as instructions vary between mattress toppers and underlays.

Use the topper only as directed and follow any instructions about positioning, rotating or airing the product. Allow it to dry fully following cleaning before placing bedding back on the bed.

Mattress Topper FAQs

What is a mattress topper?

A mattress topper is a removable layer that sits on top of your mattress to change the feel of the sleep surface. Toppers are available in different materials, thicknesses and constructions, so compare the individual product information to find an option that suits your preferences.

What's the difference between a mattress topper and an underlay?

Mattress toppers generally add a layer of cushioning, while underlays can offer a thinner or more compact layer depending on the individual product. Check the materials, construction and intended use before choosing.

Can I wash a mattress topper?

It depends on the individual product. Some mattress toppers may be suitable for machine washing or hand washing, while others may require spot cleaning or professional cleaning. Always follow the care label rather than assuming the whole topper can go in the washing machine.

How do I keep a mattress topper clean?

Follow the product's specific care instructions. Depending on the topper, this may include regular airing, vacuuming or spot cleaning. Deal with spills according to the care label and make sure the topper is completely dry before remaking the bed.