Mattress Toppers & Underlays

Shop Mattress Toppers and Mattress Underlays for a Comfier Night's Sleep

A mattress that dips through the middle can make bedtime frustrating. Maybe your bed feels too firm, or replacing it seems unnecessary while it still has life left. A small bedding change can make your sleep setup feel much better. Adding a mattress topper gives that extra cushioning and can change the feel of your sleep surface. An underlay can also make a lighter adjustment while adding comfort and support. Both can help you get more comfortable use from your mattress.

At Spotlight, we stock some of the bestselling mattress toppers and underlays from brands like Ever Rest, Tontine, Jaspa, Brampton House and more. So, there's an option for different sleeping preferences and budgets. Plus, with 120+ stores across Australia, you can shop and compare different feels in person.

What Is the Difference Between a Mattress Topper and an Underlay?

A mattress topper is thicker and plusher, while an underlay is thinner and denser. A topper noticeably changes how your bed feels, while an underlay adds a lighter comfort boost with some firmness.

Both sit above your mattress, but a topper is more ideal for adding cushioning to an older or sagging bed. It can also guard against spills, stains and dust mites. An underlay provides a more subtle adjustment and suits a mattress that only needs a small comfort boost.

You can also use both a topper and an underlay at the same time. Layer your bed with the mattress first, then the mattress protector, topper or underlay and fitted sheet.

What is the Best Mattress Topper Filling?

There is no single best filling. The right choice comes down to the feel you enjoy in bed.

• A memory foam mattress topper or polyurethane pad contours around the shoulders and hips for a supportive, pressure-relieving feel.
• Wool adds natural warmth and temperature regulation. It also suits people who want a breathable, hypoallergenic layer that resists dust mites. We also have reversible options to keep you comfortable year-round.
• Cotton and polyester fillings feel lighter and airier. They are also machine-washable.
• Bamboo mattress toppers are ideal for hot sleepers because they draw moisture away from your skin. Some models are even gel-infused to pull away excess body heat and keep your sleeping surface cool. Our guide on the best cooling mattress toppers digs deeper into this.
• Microfibre fillings mimic the softness and loft of natural down feathers. It also helps maintain maximum loft without clumping.

Getting Your Topper Thickness and Loft Just Right

A little extra loft can make a noticeable difference. Our foam and polyester toppers and underlay pads range from 3 to 4 cm thick. Quilted and pillow-top alternatives range from 500 GSM to 1000 GSM. GSM describes the weight of the fill, and a higher GSM generally means a loftier, plusher feel. But it does not necessarily tell you about the topper's firmness.

Love a softer bed? Choose a thicker, higher-loft option for a plusher feel. Medium thickness and loft give you a balanced middle ground, while a thinner, denser option may suit sleepers wanting a firmer sleep surface.

What Size Mattress Topper Do You Need?

Start with the size of your mattress. We stock underlays and mattress topper sizes that fit standard single, king single, double, king, and queen beds. Individual topper measurements can vary slightly between products, so check the measurement on the product page before choosing.

Most toppers and underlays also have a fitted skirt that wraps around your mattress and helps keep the bed topper in place. Our range comes in depths ranging from 35 cm to 45 cm. For deeper mattresses with higher walls, choose an extra-deep skirt for a snug fit.

Also keep in mind that a topper can add height. You may need a deep fitted sheet once it is on the bed.

Match Your Topper to the Way You Sleep

Think about where your body needs the most comfort.

Side sleepers often like extra cushioning around pressure points such as the hips and shoulders. Back sleepers may prefer a medium feel that supports the lower back with enough softness to settle comfortably.

If you wake with back pain, look for contouring foam or a plush pillow top to ease discomfort. A topper with extra pressure relief can also make a firm mattress feel gentler.

Hot sleepers can consider breathable materials, wool or gel-infused bamboo-covered options, as they support temperature regulation.

A mattress that feels too firm may suit a plusher topper and a lighter underlay. If your mattress has started to sag, a thicker topper can change the surface feel more noticeably. Head over to our mattress toppers and underlays buying guide for more expert tips to pick the best fit for your bed.

Keeping Your Topper Fresh and Comfy for Longer

A little regular care keeps your mattress topper feeling fresher. Start with these tips:

• Air your topper whenever you change the sheets and give it a quick vacuum. Wool toppers, in particular, need regular airing.
• Spot clean small stains with mild soap.
• Check the care label, as it can vary between filling and fabric. Some toppers are machine washable, some have a removable cover you can machine wash, and others are spot clean only.
• Keep separate electric blankets away from mattress toppers. Do not place one underneath or on top of a mattress topper. If you want extra warmth, go for a topper with heating built in, or use a wool underlay for natural insulation.

Check your topper's condition rather than age. Flattened patches, lumps in the fill or lost loft can tell you it is time for a change.

Why Start Your Bedding Refresh with Spotlight?

Spotlight is family-owned and has been serving Australian households since 1973. With over 50 years of experience, we know what makes a comfortable night's sleep.

With 120+ stores across Australia, you can compare a plush pillow top with a firmer foam pad in person before buying. That makes choosing the right feel much easier.

You can also sort out the rest of your bed in one trip. Spotlight stocks bed sheets, quilts, pillows, mattress protectors, and bed linen alongside toppers and underlays.

Plus, we stock sizes that fit single beds all the way up to king sizes. And with heaps of options from Australian and global brands, there's an option for every budget.

Get the Best Value on Mattress Toppers With the Spotlight VIP Club

Join the Spotlight VIP Club to get exclusive deals and enjoy member pricing on your next bedroom upgrade. Membership is free and you get exclusive discounts, early notice of sales, birthday vouchers, welcome vouchers, and more. Sign up in store or online before you choose your new mattress topper.

Sleep Comfier for Less with Bargains Galore

Give your mattress a comfort boost that suits the way you sleep. Shop bargains galore on our full range of mattress toppers and underlays online or visit your nearest Spotlight store. Compare filling, loft and firmness, then choose what feels right for your bed. And if you shop in-store, a team member can also help you choose the right layer for your bed.

Mattress Topper and Underlay FAQs

Can you use an electric blanket with a mattress topper?

Yes, you can use an electric blanket with a mattress topper or underlay, but you must place the electric blanket on top of the mattress topper. Otherwise, the topper can overheat and may pose a fire hazard. For a safer warming option, choose a heated topper with built-in heating or use a wool underlay for natural insulation.

What is the difference between a mattress topper and a mattress protector?

A mattress topper changes how your mattress feels by adding substantial cushioning. A mattress protector is thinner and guards against spills, stains and dust mites without changing the comfort of your bed.

How long does a mattress topper last?

There is no single answer for how long a mattress topper lasts. Look for signs of wear instead. Flattened patches, lumps in the fill or a loss of loft mean it is time to replace your topper.