What Does a Mattress Protector Do? Benefits, Types & Buying Guide

What Does a Mattress Protector Do?

If you've invested in a quality mattress, protecting it is one of the simplest ways to keep it cleaner, fresher, and performing well for years to come.

A mattress protector is a removable cover that sits over your mattress and underneath your fitted sheet. Its primary purpose is to protect your mattress from sweat, spills, stains, allergens, dust mites, and everyday wear without noticeably changing how your mattress feels.

Unlike a mattress topper, which adds cushioning or changes firmness, a mattress protector focuses on hygiene and protection. Many modern protectors are also waterproof, breathable, and machine washable, making them suitable for everyday use.

For most Australian households, a mattress protector is recommended if you:

• Have purchased a new mattress
• Want to extend mattress lifespan
• Sleep hot or sweat during the night
• Have children or pets
• Suffer from allergies or asthma
• Want an easier way to keep your bed clean

Quick Answer

If you're wondering whether you really need a mattress protector, the answer is yes for most people.

A quality mattress protector helps:

✓ Protect against spills and stains

✓ Reduce exposure to dust mites and allergens

✓ Prevent sweat and body oils from soaking into the mattress

✓ Improve hygiene by creating a washable barrier

✓ Extend the life of your mattress

✓ Help maintain some mattress warranties

It won't make your mattress noticeably softer or firmer—but it can help keep it in much better condition over time.

Quick Comparison

If You Want To...	A Mattress Protector Can Help
Protect a new mattress	✅ Yes
Prevent spills and stains	✅ Yes
Reduce allergens	✅ Yes
Change mattress comfort	❌ No
Make the mattress softer	❌ No (choose a mattress topper instead)
Extend mattress lifespan	✅ Yes

What Is a Mattress Protector?

A mattress protector is a thin protective layer designed to cover your mattress without affecting its overall comfort or support.

It usually fits like a fitted sheet or fully encases the mattress, creating a barrier between your body and the mattress itself.

Depending on the design, a mattress protector may provide:

• Waterproof protection against spills and accidents
• Resistance to dust mites, allergens, and bacteria
• Moisture protection from sweat and body oils
• Easier cleaning through machine washing
• Reduced everyday wear on the mattress surface

Because mattresses cannot be easily washed, a protector takes on most of the everyday exposure instead.

Think of it as insurance for your mattress—it's designed to protect your investment rather than change how your bed feels.

Mattress Protector vs Mattress Topper: What's the Difference?

One of the most common questions Australian shoppers ask is whether they need a mattress protector or a mattress topper.

Although they sit in a similar position on the bed, they serve completely different purposes.

Feature	Mattress Protector	Mattress Topper
Main Purpose	Protect the mattress	Improve comfort
Waterproof	Often	Rarely
Changes Mattress Feel	Minimal	Yes
Adds Cushioning	No	Yes
Protects Against Spills	Yes	Limited
Machine Washable	Usually	Sometimes

A simple rule:

Choose a mattress protector if your goal is to keep your mattress clean and protected.

Choose a mattress topper if your goal is to make your mattress softer, firmer, or more comfortable.

Many Australians actually use both—a topper for comfort and a protector to keep both the topper and mattress clean.

👉 If you're unsure whether a topper is the better solution, read our Mattress Topper guide to understand how toppers change comfort and support.

What Does a Mattress Protector Actually Do?

Although mattress protectors look simple, they perform several important functions that help maintain both your mattress and your sleep environment.

1. Protects Against Spills and Stains

Accidents happen.

Whether it's a cup of coffee, a child's drink bottle, or a pet jumping onto the bed after coming inside, liquids can quickly soak into a mattress.

Unlike bedding, mattresses are extremely difficult to clean thoroughly once liquid reaches the inner layers.

A waterproof mattress protector creates a barrier that prevents most spills from reaching the mattress while remaining comfortable enough for everyday sleeping.

2. Reduces Sweat and Moisture Build-up

Even if you don't consider yourself a hot sleeper, your body naturally releases moisture during the night.

Over months and years, that moisture can gradually soak into the mattress.

This may contribute to:

• unpleasant odours
• yellow staining
• bacterial growth
• deterioration of foam materials

A breathable mattress protector helps prevent this moisture from reaching the mattress while allowing air to circulate.

This is particularly beneficial during Australia's warmer months, when higher temperatures often lead to increased perspiration.

3. Helps Reduce Dust Mites and Allergens

Mattresses naturally collect:

• dead skin cells
• household dust
• pet dander
• pollen
• dust mites

For allergy sufferers, these allergens can affect sleep quality over time.

A washable mattress protector creates a removable barrier that can be cleaned regularly, helping reduce the build-up of common household allergens.

While it won't eliminate allergies completely, it can be an effective part of a cleaner sleeping environment.

4. Makes Your Mattress Easier to Keep Clean

Most mattresses cannot simply be thrown into the washing machine.

Cleaning usually involves:

• vacuuming
• spot cleaning
• airing out the mattress

A mattress protector dramatically simplifies maintenance because it's designed to be removed and washed regularly.

Instead of cleaning the mattress itself, you simply wash the protector.

5. Helps Extend Mattress Lifespan

A quality mattress is designed to last many years.

However, exposure to moisture, stains, dirt, and everyday wear can gradually reduce its performance.

Using a mattress protector won't stop natural ageing, but it can help preserve the materials inside your mattress and keep it looking newer for longer.

For many people, it's one of the simplest ways to protect a significant investment.

Do You Really Need a Mattress Protector?

The answer is yes—for most Australian households, a mattress protector is a worthwhile investment.

Whether you're buying a brand-new mattress or trying to extend the life of your current one, a mattress protector helps reduce everyday wear while making your bed easier to keep clean.

It becomes even more valuable if you:

• Have children or pets
• Sleep hot or sweat during the night
• Suffer from allergies or asthma
• Own a memory foam or hybrid mattress
• Want to protect an expensive mattress from accidental spills

Who Should Use a Mattress Protector?

If You...	Should You Use One?
Bought a new mattress	✅ Definitely
Sleep hot	✅ Recommended
Have allergies	✅ Highly recommended
Have children	✅ Definitely
Have pets	✅ Definitely
Eat or drink in bed	✅ Definitely
Want your mattress to last longer	✅ Recommended

For most people, there's very little downside. Modern mattress protectors are far more breathable, quieter, and more comfortable than older waterproof designs, making them suitable for everyday use.

How to Choose the Right Mattress Protector

Not every mattress protector offers the same level of protection or comfort.

Before buying, consider these five factors.

1. Waterproof Protection

If protecting your mattress from spills, accidents, or sweat is your priority, choose a waterproof mattress protector.

Modern waterproof protectors typically use a breathable waterproof membrane that blocks liquids while allowing air to circulate.

They're ideal for:

• families with children
• pet owners
• people who sweat during sleep
• anyone wanting maximum mattress protection

2. Breathability

Many Australians worry that a mattress protector will make the bed feel hotter.

High-quality protectors are designed to improve airflow while protecting the mattress.

Look for features such as:

• breathable fabrics
• moisture-wicking materials
• airflow-friendly construction

If you regularly sleep hot, breathability is just as important as waterproofing.

3. Material

The fabric used in a mattress protector affects comfort, temperature regulation, and durability.

Different materials suit different sleepers, which we'll compare below.

4. Mattress Depth

A mattress protector should fit your mattress properly.

Before buying, check:

• mattress thickness
• fitted skirt depth
• compatibility with pillow-top mattresses

A protector that's too shallow may slip off during the night, while one that's too loose can bunch underneath your sheets.

5. Easy Care

Because mattress protectors are designed to be washed regularly, choose one that's:

• machine washable
• easy to remove
• quick to dry
• durable after repeated washing

The easier it is to clean, the more likely you'll maintain a hygienic sleep environment.

Mattress Protector Materials Compared

Different materials offer different benefits, particularly for Australia's changing climate.

Material	Waterproof	Cooling	Softness	Best For
Cotton	Optional	★★★★☆	★★★★★	Everyday comfort
Bamboo Blend	Optional	★★★★★	★★★★★	Hot sleepers
Tencel™	Optional	★★★★★	★★★★☆	Moisture management
Polyester	Usually	★★★☆☆	★★★☆☆	Budget-friendly protection
PU Waterproof Membrane	Yes	★★★★☆	Depends on cover fabric	Spill protection

For most Australian sleepers, breathable fabrics paired with a waterproof membrane offer the best balance between comfort and protection.

Waterproof vs Breathable Mattress Protectors

Many shoppers assume they have to choose between waterproof protection and sleeping cool.

Fortunately, that's no longer the case.

Waterproof Mattress Protectors

Best for:

• families
• children
• pets
• accidental spills
• heavy sweaters

Benefits:

• protects against liquids
• prevents stains
• extends mattress life

Potential downside:

Lower-quality waterproof protectors may trap heat or feel slightly less breathable.

Breathable Mattress Protectors

Best for:

• hot sleepers
• warmer Australian climates
• people who prioritise airflow

Benefits:

• better temperature regulation
• moisture management
• quieter sleep surface

Potential downside:

Some breathable protectors are water-resistant rather than fully waterproof.

Which Is Better?

For most Australian households, the ideal choice is a mattress protector that combines both waterproof protection and breathable construction.

Modern designs use thin waterproof membranes that protect against liquids without creating the noisy, plastic feel associated with older protectors.

Do Mattress Protectors Make You Hot?

Not necessarily.

Older waterproof mattress protectors often trapped heat because they relied on thick plastic layers.

Today's premium protectors are very different.

Many combine:

• breathable cotton or bamboo covers
• moisture-wicking fabrics
• thin waterproof membranes
• improved airflow

As a result, they provide protection without significantly affecting temperature.

If you're naturally a hot sleeper, look for protectors specifically designed with breathable materials rather than focusing solely on waterproof performance.

Can You Use a Mattress Topper and Mattress Protector Together?

Yes—and many Australians do.

A mattress topper and a mattress protector perform different jobs, so they work best when used together rather than as alternatives.

The recommended layering order is:

1. Bed base
2. Mattress
3. Mattress topper
4. Mattress protector
5. Fitted sheet

The topper improves comfort by changing the feel of your mattress, while the protector shields both the mattress and the topper from moisture, stains, and allergens.

This combination allows you to enjoy extra comfort without sacrificing cleanliness or protection.

A Practical Option for Everyday Mattress Protection

The best mattress protector is one you'll actually keep on your bed every day.

That means it should protect against spills and everyday wear without making your mattress feel hot, noisy, or uncomfortable.

The Onebed Mattress Protector is designed with exactly that balance in mind. Rather than changing how your mattress feels, it adds a breathable protective layer that helps defend against moisture, stains, dust mites, and allergens while maintaining the comfort of your existing mattress.

Key features include:

• Waterproof protection against everyday spills and accidents
• Breathable construction to promote airflow
• Quiet, non-crinkly fabric for uninterrupted sleep
• Soft sleep surface with minimal impact on mattress feel
• Machine washable for easy care

Whether you're protecting a brand-new mattress or extending the life of your current one, it's a practical addition to almost any bedroom.

How Often Should You Wash a Mattress Protector?

A mattress protector only works effectively if it's cleaned regularly.

For most Australian households, the following schedule works well:

Regular washing helps remove:

• sweat
• body oils
• dust mites
• allergens
• bacteria

Always follow the care label to maintain waterproof performance and extend the life of the protector.

Common Mattress Protector Myths

Many people avoid using a mattress protector because of outdated misconceptions. Here are some of the most common myths.

Myth 1: Mattress Protectors Make the Bed Hot

Not necessarily.

Older waterproof protectors often trapped heat because they used thick plastic layers.

Modern protectors use breathable fabrics and lightweight waterproof membranes that allow much better airflow while still protecting the mattress.

Myth 2: They Feel Noisy

Quality mattress protectors are designed to be quiet.

Premium models use soft fabric surfaces that don't produce the crinkly plastic sound many people remember from older waterproof products.

Myth 3: They're Only for Children

While mattress protectors are useful for children's beds, they're just as valuable for adults.

Anyone who wants to protect their mattress from sweat, spills, allergens, or everyday wear can benefit from using one.

Myth 4: They Change Mattress Comfort

A mattress protector should have very little impact on how your mattress feels.

If you're looking to make your mattress softer or firmer, a mattress topper—not a protector—is the right solution.

Mattress Protector Buying Checklist

Before purchasing a mattress protector, ask yourself:

✓ Do I want waterproof protection?

✓ Do I sleep hot?

✓ Do I have allergies?

✓ Does it fit my mattress depth?

✓ Is it machine washable?

✓ Is the fabric breathable?

✓ Will it protect my mattress without changing comfort?

If you can answer "yes" to most of these questions, you're likely choosing a protector that will suit your needs well.

Final Thoughts

A mattress protector may not be the most exciting bedroom purchase, but it can be one of the smartest.

It helps keep your mattress cleaner, protects against everyday accidents, reduces exposure to allergens, and may even extend the life of one of the most expensive items in your bedroom.

For most Australian sleepers, the best mattress protector is one that combines waterproof protection with breathable comfort, allowing you to protect your mattress without compromising how it feels.

If you're investing in a quality mattress, adding a mattress protector is a simple step that can help keep it performing at its best for years to come.

Frequently Asked Questions

Do you really need a mattress protector?

For most people, yes. A mattress protector helps protect your mattress from spills, stains, moisture, allergens, and everyday wear while making it easier to keep your bed clean.

Is a mattress protector necessary for memory foam mattresses?

Yes. Memory foam can absorb moisture more easily than some other mattress materials, making a protector especially useful for preventing stains and helping maintain hygiene.

Can you sleep without a mattress protector?

You can, but your mattress will be more exposed to sweat, spills, allergens, and general wear. Using a protector provides an extra layer of defence and makes ongoing maintenance much easier.

Does a mattress protector change how a mattress feels?

A good-quality mattress protector should have minimal impact on comfort. Its main purpose is protection rather than changing the firmness or softness of your mattress.

Can you use a mattress topper and mattress protector together?

Yes. In fact, many Australians use both. The mattress topper improves comfort, while the mattress protector helps keep both the topper and mattress clean.

Do hotels use mattress protectors?

Yes. Most hotels use mattress protectors to protect mattresses from spills, stains, allergens, and everyday wear, helping maintain hygiene between guests and extending the lifespan of their mattresses.

Can mattress protectors help with allergies?

Yes. While they won't eliminate allergies, mattress protectors can help reduce exposure to dust mites, pet dander, pollen, and other allergens by creating a washable barrier over the mattress.

How long does a mattress protector last?

A quality mattress protector typically lasts between 2 and 5 years, depending on the materials, washing frequency, and overall care. Replacing it when it begins to lose its waterproof performance or fit will help maintain effective protection.