Polyester

What Is Polyester? And Should We Be Living and Sleeping in It?

Polyester is everywhere. It is in our clothes, bedding, cushions, carpets, furniture and soft furnishings.

It is inexpensive, strong, wrinkle resistant and easy to manufacture.

But polyester is also plastic.

And as we learn more about microplastics in our homes, our environment and even the human body, it is reasonable to ask a simple question:

Where natural fibres can do the job beautifully, do we really need to surround ourselves with more plastic?

At Ecodownunder, Living with Nature means thinking about the materials we bring into our homes, what we put against our skin and what eventually returns to the environment.

This is our guide to polyester: what it is, why it became so common, what we know about its effects on people and the environment, what science still doesn't know, and when natural fibres may be the better choice.

What is polyester?

Polyester is a synthetic fibre.

The polyester most commonly used in clothing and homewares is polyethylene terephthalate, or PET — a type of plastic generally manufactured from fossil-fuel-derived raw materials.

The same broad polymer is also widely used to manufacture plastic bottles and packaging.

Instead of growing naturally like cotton or linen, or being produced naturally like wool, polyester is manufactured through chemical processes and extruded into extremely fine plastic filaments that can then be spun, woven or knitted into fabric.

That makes polyester:

  • strong

  • lightweight

  • inexpensive

  • quick drying

  • wrinkle resistant

  • easy to mass produce.

These attributes explain its enormous commercial success.

But they don't necessarily make polyester the best fibre for everything we put in our homes or against our bodies.

Is polyester plastic?

 

Yes. Polyester textile fibre is a form of plastic.

That can be confusing because a soft polyester blanket or silky polyester dress doesn't look or feel like a plastic container.

The difference is its physical form.

Plastic can be manufactured as a bottle, film, foam — or an incredibly fine fibre.

When thousands of those fine polyester fibres are woven together, we experience them as fabric.

Terms such as:

  • polyester

  • microfibre

  • polar fleece

  • synthetic fleece

can therefore describe textiles that are substantially or entirely made from plastic fibres.

Microfibre is not another natural fibre. Most textile microfibre products are finely manufactured synthetic fibres, commonly polyester or polyester blends.

Why is polyester so widely used?

There are good practical reasons manufacturers use polyester.

It can be:

Cheap.
Polyester makes it possible to manufacture textiles at extremely low prices.

Strong.
The fibres have high tensile strength.

Wrinkle resistant.
Polyester generally creases less than cotton or linen.

Fast drying.
Because polyester absorbs relatively little water into the fibre, it can dry quickly.

Easy to colour and engineer.
Manufacturers can produce an enormous variety of textures, colours and performance characteristics.

Useful for specialist applications.
Synthetic fibres can make sense where particular technical properties such as water resistance, very low weight or high abrasion resistance are important.

So the question isn't whether polyester has useful properties.

It does.

The better question is:

Do we need those properties in every product we live in?

A waterproof jacket may genuinely need synthetic materials.

A bedsheet doesn't.

Is polyester bad for you?

There isn't good evidence that simply touching ordinary polyester fabric is inherently poisonous or that wearing polyester inevitably causes disease.

That isn't the argument we make.

The health question is more nuanced.

There are several legitimate reasons to consider reducing unnecessary polyester around the body and home:

  1. polyester textiles shed microplastic fibres;

  2. these fibres can enter air, dust, water and the broader environment;

  3. humans are exposed to microplastics through inhalation and ingestion;

  4. microplastics have now been detected in human tissues;

  5. the long-term consequences of continual microplastic exposure are still being investigated;

  6. dyes and chemical finishes used on some textiles can also cause skin irritation or allergic reactions in susceptible people.

We think this creates a reasonable precautionary question:

If a natural fibre performs the same job beautifully, why add another source of plastic to your everyday environment?

 

“If natural fibres already do the job beautifully, why introduce more plastic into your home?”

 

Does polyester release microplastics?

Yes.

Synthetic textiles are a recognised source of microplastic pollution.

Polyester doesn't need to disappear visibly from a garment for this to happen.

Tiny fibres can separate through:

  • textile manufacturing

  • abrasion

  • wearing

  • sleeping

  • washing

  • tumble drying

  • ageing

  • disposal.

These particles can be too small to see individually.

Because polyester fibres are plastic, very small polyester fibres released from a textile are considered microplastics.

Polyester, washing and microplastics

Washing synthetic textiles is one well-established way microplastic fibres are released.

A washing machine creates:

  • water movement

  • friction

  • flexing

  • abrasion.

Tiny fibres can break free from the fabric and enter wastewater.

Wastewater treatment can capture a proportion of these fibres, but this doesn't make the problem disappear. Fibres that aren't retained can enter waterways, while captured microplastics can become concentrated in wastewater sludge that may subsequently enter other environmental pathways.

This is why synthetic clothing and household textiles are recognised internationally as a significant source of environmental microplastic pollution.

And washing isn't the only source.

Synthetic textiles can also release fibres simply through ordinary use.

Do polyester clothes and bedding put microplastics into the air?

Synthetic textiles can release fibres through everyday abrasion as well as washing.

That means textile fibres can become part of indoor dust and air.

Consider everything inside an average home that may contain synthetic fibres:

  • clothing

  • sheets

  • quilt covers

  • quilts

  • pillows

  • mattress protectors

  • blankets

  • rugs

  • carpets

  • curtains

  • cushions

  • lounges.

Individually, each source may seem insignificant.

Collectively, they represent an enormous amount of synthetic material within our indoor environment.

This matters because people spend most of their lives indoors.

It is another reason we think reducing unnecessary synthetic materials in the home is sensible.

Are microplastics in the human body?

Research has detected microplastics or plastic-associated particles in human biological samples and tissues.

Scientists are now investigating what happens after people inhale or ingest very small particles, where different particles travel and whether long-term exposure contributes to disease.

This is an evolving field.

There is an important distinction between two statements:

“Microplastics have been found in people.”

There is good evidence for this.

And:

“Microplastics from your polyester sheets will cause a particular disease.”

Current science does not establish that.

We should not confuse evidence of exposure with proof of a specific health outcome.

What the science says

What we know

Polyester is plastic.
The polyester used in most clothing and home textiles is PET, a synthetic plastic polymer generally made from fossil-fuel-derived materials.

Polyester textiles shed microplastic fibres.
Tiny synthetic fibres can be released during manufacturing, wearing, washing, drying and everyday use.

Textile microplastics enter the environment.
Synthetic textile fibres have been found in wastewater, waterways, oceans, soil, household dust and air.

People are exposed to microplastics.
Humans can inhale microplastic particles and fibres and ingest them through food, water and dust.

Microplastics have been detected in the human body.
Research has reported microplastics or plastic-associated particles in human biological samples and tissues.

What science is still working out

What does lifelong exposure do to our health?
Researchers are investigating whether chronic exposure to micro- and nanoplastics contributes to inflammation or particular diseases, but many long-term health effects are not yet established.

How much exposure comes from textiles?
Polyester clothing and homewares are recognised sources of microplastic fibres, but it is difficult to determine precisely how much of an individual's total exposure comes from bedding, clothing or other sources.

Can polyester fibres pass through healthy skin?
There isn't currently strong evidence that fibres shed from ordinary polyester clothing or bedding routinely penetrate intact skin and enter the bloodstream in meaningful amounts. Inhalation and ingestion are better-established exposure pathways.

Does finding microplastics in the body prove they cause disease?
No. Detection demonstrates exposure. It does not by itself establish that microplastics caused a particular health condition.

Our view

We don't need to exaggerate what science knows.

We already know polyester is plastic, synthetic textiles shed persistent microplastic fibres, those fibres enter our homes and environment, and people are exposed to microplastics.

The long-term health consequences are still being investigated.

Where a natural fibre already does the job beautifully, we think reducing unnecessary plastic is simply a sensible choice.

 

Can polyester microplastics get into your body through your skin?

This is an area where claims online often run ahead of the evidence.

Our skin provides a highly effective protective barrier.

At present there isn't strong evidence demonstrating that microplastic fibres routinely shed from normal polyester clothing or bedding, pass through healthy intact human skin and then enter the bloodstream in significant quantities.

The more established routes of human exposure to environmental microplastics are inhalation and ingestion.

That doesn't mean researchers have answered every question about dermal exposure, particularly when particles become extremely small.

It means we should describe what is known accurately.

We believe there are already enough good reasons to reduce unnecessary plastic without exaggerating the science.

What about chemicals in polyester clothing?

It is useful to separate the polyester fibre itself from everything manufacturers may add during textile production.

Textiles can be:

  • dyed

  • printed

  • softened

  • coated

  • made wrinkle resistant

  • made stain resistant

  • made water resistant

  • given antimicrobial treatments

  • treated with other finishing chemicals.

The chemicals present vary enormously according to the individual textile and manufacturing process.

So it isn't accurate to say:

“All polyester clothing is toxic.”

However, neither should we assume every textile contains nothing except its stated fibre.

Polyester and skin irritation

Some people experience textile-related skin irritation or allergic contact dermatitis.

Polyester requires particular types of dyes, commonly including disperse dyes.

Some disperse dyes are recognised contact allergens and have been associated with textile contact dermatitis in susceptible people.

Other chemicals or finishes used in textiles may also contribute to irritation.

This doesn't mean polyester itself causes an allergic reaction in everyone.

But if someone has sensitive skin or has experienced reactions to particular garments, dyes and textile finishes can be worth considering.

Is polyester breathable?

Polyester behaves differently around moisture from natural fibres such as cotton, linen and wool.

Polyester is relatively hydrophobic, meaning the fibre itself absorbs relatively little water.

Manufacturers can engineer sophisticated polyester sports fabrics to move moisture across or through the fabric, which can be extremely useful for particular performance applications.

But ordinary polyester fabric doesn't naturally manage moisture in the same way as absorbent natural fibres.

This can contribute to the familiar feeling of synthetic fabric being:

  • hot

  • sweaty

  • clammy

  • uncomfortable against the skin.

Fabric construction matters too, so it isn't accurate to say every polyester fabric is hotter than every natural fabric.

But fibre choice matters.

And it matters especially in bed.

Polyester bedding: why fibre matters when you sleep

Most adults spend somewhere around a third of their lives in bed.

If you sleep for eight hours a night, that's approximately:

2,900 hours each year.

Your bedding therefore represents one of the longest and most intimate material contacts in your life.

Sheets and pillowcases sit directly against your skin.

You breathe immediately beside your pillow.

Your body releases heat and moisture throughout the night.

Your bedding experiences constant movement and friction.

That makes the choice of material particularly relevant.

For us, the question is simple:

If cotton, linen or wool can do the job naturally, why sleep surrounded by plastic fibres?

Polyester sheets vs cotton sheets

There are legitimate advantages on both sides.

Polyester sheets Cotton sheets
Fibre Synthetic plastic Natural plant fibre
Typical source Fossil-derived PET Cotton plant
Initial price Usually lower Varies
Wrinkle resistance High Lower
Quick drying Yes Slower
Moisture absorption Low High
Natural fibre No Yes
Microplastic fibre shedding Yes No plastic microfibres
Biodegradability of base fibre Poor Cellulose-based
Feel Depends on construction Depends on construction
Softens naturally with washing Limited Often
Suitable for natural-fibre home No Yes

Polyester can win on price and convenience.

But for a product designed to sit directly against our bodies every night, we prefer the simplicity and natural feel of cotton.

What about poly-cotton sheets?

Poly-cotton combines cotton and polyester.

Typical compositions might include:

  • 50% cotton / 50% polyester

  • 60% cotton / 40% polyester

  • 80% cotton / 20% polyester.

Manufacturers use these blends because polyester can:

  • reduce cost

  • reduce wrinkling

  • increase strength

  • speed drying.

But adding cotton doesn't stop the polyester component being plastic.

A 50% cotton / 50% polyester sheet is still approximately half synthetic fibre by fibre composition.

Blends can also make recycling more difficult because two very different materials have been intimately combined.

If your objective is to reduce synthetic fibres within your bedroom, look for 100% natural fibre rather than simply a product marketed prominently as “cotton”.

Always read the fibre-content label.

Is microfibre polyester?

Usually, yes.

“Microfibre” describes the extremely fine size of the fibres rather than identifying a natural material.

Most microfibre sheets, cleaning cloths and similar household textiles are made from:

  • polyester

  • polyamide/nylon

  • or mixtures of both.

A product labelled 100% polyester microfibre is therefore essentially fabric manufactured from extremely fine plastic fibres.

Its extraordinary softness doesn't change the material from which it is made.

Is recycled polyester better?

Recycled polyester can reduce demand for virgin fossil-derived polyester.

That is a genuine benefit.

It is commonly produced using existing PET plastic, including plastic bottles, as a feedstock.

But recycling doesn't transform polyester into a natural fibre.

The resulting material is still polyester.

It can still shed synthetic microfibres.

And it does not suddenly become biodegradable because it has been recycled.

So we see recycled polyester as:

a potentially better form of polyester when synthetic fibre is genuinely necessary — not a substitute for natural fibre when natural fibre works perfectly well.

What about polyester made from recycled plastic bottles?

Turning an existing plastic bottle into another useful product can extend the useful life of that material.

But there is a broader circularity question.

A PET bottle is a relatively simple object that can potentially be collected and recycled within a bottle-to-bottle system.

Once that plastic becomes very fine textile fibres — particularly when blended with another fibre — recovering it again can become more difficult.

The plastic hasn't disappeared.

It has changed form.

So “made from recycled bottles” shouldn't automatically be interpreted as:

“plastic free”, “biodegradable” or “natural”.

It isn't.

Does polyester biodegrade?

Conventional polyester does not biodegrade in the same way as natural cotton, linen or wool fibres.

Instead, polyester can persist and progressively fragment into smaller pieces.

This distinction matters.

Natural fibre doesn't mean zero environmental impact. Cotton still requires agriculture, water and processing. Wool requires land and livestock. Every textile involves environmental choices.

But at the end of its useful life, the underlying fibre chemistry is fundamentally different.

Cotton is primarily cellulose.

Wool is primarily protein.

Polyester is plastic.

Polyester and the environment

The environmental question extends far beyond microplastics.

Conventional polyester is predominantly associated with fossil-fuel feedstocks.

Its lifecycle involves:

oil and gas → petrochemicals → polymer → fibre → fabric → product → waste.

Its widespread use therefore contributes to demand for petrochemical materials.

And because polyester is inexpensive and easy to manufacture at enormous scale, it has also become deeply connected with the economics of disposable fashion and homewares.

That doesn't mean polyester itself created fast fashion.

But cheap synthetic fibres have helped make extremely cheap textile products possible.

Polyester and textile waste

A cheap textile isn't necessarily inexpensive if we repeatedly replace it.

The environmental impact of a textile depends not simply on its fibre but also:

  • how well it is made

  • how often it is used

  • how long it lasts

  • how frequently it is replaced

  • how it is washed

  • what happens when we no longer want it.

At Ecodownunder, we believe the better question is not:

“How cheaply can this be made?”

It is:

“How well can this be made, how long can we use it and what is it made from?”

That's the difference between consuming more and living better with less.

Are natural fibres perfect?

No.

And pretending otherwise doesn't help anyone make better decisions.

Cotton agriculture uses land and water.

Some cotton production uses significant pesticides and fertilisers.

Textile dyeing can have environmental impacts regardless of fibre.

Wool involves livestock and agricultural resources.

Manufacturing, transportation and laundering all have environmental consequences.

Choosing natural fibres doesn't make a product impact-free.

What it can do is reduce one particular problem:

introducing more persistent plastic fibres into our homes and the environment.

Natural living isn't about perfection.

It is about making better choices where we reasonably can.

Are there times when polyester makes sense?

Yes.

We don't believe all synthetic materials should simply disappear tomorrow.

There are situations where engineered synthetic materials provide genuinely useful characteristics that can be difficult to achieve naturally.

Examples may include:

  • waterproof outdoor equipment

  • protective clothing

  • specialist safety products

  • particular medical applications

  • technical sports equipment

  • products requiring unusually high abrasion resistance.

The question should be one of purpose.

Does the synthetic material provide an important benefit here?

With products such as sheets, towels, quilt covers, throws and many everyday clothes, natural fibres already perform exceptionally well.

That's where we think the choice becomes much easier.

How can I reduce polyester and synthetic fibres at home?

You don't need to empty your wardrobe or throw everything away.

In fact, throwing away useful products prematurely may simply create more waste.

Instead, start when something genuinely needs replacing.

1. Read fibre labels

Look beyond the marketing description.

Check whether the product is:

  • 100% cotton

  • 100% linen

  • 100% wool

or whether polyester, nylon, acrylic or other synthetics have been blended into it.

2. Start with products closest to your body

Prioritise:

Sheets and pillowcases
You spend thousands of hours sleeping against them.

Sleepwear and underwear
These have prolonged direct skin contact.

Towels
Natural cotton is inherently suited to absorbing water.

Baby bedding and clothing
Reducing unnecessary plastics around children is a reasonable precautionary choice.

3. Replace products gradually

There is little point creating a pile of textile waste simply to become “plastic free”.

Use what you already own.

When it needs replacing, choose thoughtfully.

4. Buy less and buy better

A durable natural product that is used for years is very different from buying large quantities of disposable “eco” products.

5. Choose natural fibres where they make sense

Look for:

  • cotton

  • organic cotton

  • linen

  • hemp

  • wool

depending on what the product needs to do.

The Ecodownunder approach: Living with Nature

Ecodownunder started in Australia in 1997 with a simple belief:

We can make better choices about the things we bring into our homes.

Almost thirty years later, that idea feels more relevant than ever.

Our lives have become increasingly surrounded by plastic.

Plastic packaging.

Plastic containers.

Plastic furniture.

Plastic clothes.

Plastic bedding.

Plastic doesn't suddenly become natural because it has been spun into a soft fibre.

So where beautiful natural materials already do the job, our preference is simple.

Choose nature.

Cotton for sheets and towels.

Wool for warmth.

Natural fibres against the body.

Products designed to be used and enjoyed for years rather than treated as disposable.

Not because every natural material is perfect.

Not because touching polyester has been proven to make people ill.

But because reducing unnecessary plastic is one practical way to create a home that feels a little closer to nature.

Living with Nature.

It's not about living perfectly.

It's about choosing naturally whenever we can.

Frequently Asked Questions About Polyester

Is polyester plastic?

Yes. The polyester commonly used in clothing and homewares is polyethylene terephthalate, or PET, a synthetic plastic polymer generally produced from fossil-fuel-derived feedstocks.

Is polyester bad for you?

There isn't evidence that simply touching ordinary polyester fabric inevitably harms your health. The more established concerns relate to microplastic fibre shedding, environmental exposure, textile dyes and finishes, comfort and the unanswered questions surrounding long-term human exposure to micro- and nanoplastics.

Is polyester toxic?

It is misleading to describe all polyester textiles simply as “toxic”. Polyester is a synthetic plastic fibre and textile products may also contain dyes and finishing chemicals. Some textile dyes and chemicals can cause reactions in susceptible people, but the composition varies significantly between products.

Does polyester release microplastics?

Yes. Polyester and other synthetic textiles can release tiny plastic fibres during manufacture, wearing, washing and disposal. These synthetic microfibres are a recognised source of environmental microplastics.

Do polyester sheets contain microplastics?

Polyester sheets are themselves made from plastic fibres. When tiny fragments or fibres are released from polyester fabric, those particles may fall within the definition of microplastics.

Do polyester clothes release microplastics when you wear them?

Synthetic fabrics can shed fibres through ordinary abrasion and wear as well as through washing. Textile-derived fibres can therefore become part of household dust and air.

Can polyester enter your body through your skin?

There is currently insufficient evidence to claim that polyester microfibres from ordinary clothing or bedding routinely penetrate intact human skin and enter the body in significant quantities. Inhalation and ingestion are better established pathways for environmental microplastic exposure.

Are microplastics found in humans?

Microplastics or plastic-associated particles have been reported in human biological samples and tissues. Scientists are continuing to investigate their behaviour within the body and their potential long-term health effects.

Do microplastics cause health problems?

This remains an active area of research. Laboratory and observational studies have raised concerns about possible biological effects, but the relationship between normal environmental exposure and particular human diseases has not been conclusively established.

Can polyester irritate sensitive skin?

Some people experience textile-related irritation or allergic contact dermatitis. Certain disperse dyes used with synthetic textiles are recognised contact allergens. Individual susceptibility and the particular dyes and finishes used in a garment are important.

Is polyester breathable?

Polyester absorbs relatively little moisture compared with natural fibres such as cotton. Fabric construction can substantially change performance, and engineered synthetic sports fabrics may manage moisture very effectively, but ordinary polyester bedding can feel warmer or clammy to some sleepers.

Is polyester good for bed sheets?

Polyester sheets are generally inexpensive, durable, fast drying and wrinkle resistant. Cotton offers a natural alternative that absorbs moisture and avoids synthetic plastic fibre shedding. For bedding that sits against your body for thousands of hours each year, we prefer 100% natural fibres.

Are cotton sheets better than polyester sheets?

It depends on what matters most to you. Polyester generally wins on low price, wrinkle resistance and fast drying. Cotton provides a natural fibre, good moisture absorption and no polyester microplastic shedding. For a natural bedroom, we recommend 100% cotton.

Is poly-cotton natural?

No. Poly-cotton is a mixture of natural cotton and synthetic polyester. A 50% cotton / 50% polyester fabric contains approximately half polyester by fibre composition.

Is microfibre the same as polyester?

Microfibre describes very fine manufactured fibres rather than a particular raw material. Most household microfibre textiles are made from polyester, polyamide/nylon or mixtures of these synthetic materials.

Is recycled polyester plastic?

Yes. Recycled polyester remains polyester and therefore remains a plastic fibre. Recycling can reduce demand for virgin polyester but does not make the resulting textile natural or biodegradable.

Does recycled polyester shed microplastics?

Recycled polyester is still a synthetic plastic fibre and can shed microfibres. The exact amount varies according to fibre quality, yarn construction, fabric construction, manufacturing and use.

Is polyester biodegradable?

Conventional PET polyester is highly resistant to normal biodegradation. It can break into progressively smaller plastic particles rather than decomposing like natural cellulose or protein fibres.

What are the best natural alternatives to polyester?

Depending on the use, natural alternatives include:

  • cotton

  • organic cotton

  • linen

  • hemp

  • wool.

For sheets and towels, cotton is particularly practical. For insulation and bedding warmth, wool can provide excellent natural temperature and moisture management.

Should I throw away all my polyester clothes and bedding?

No. Creating unnecessary waste doesn't solve the problem. A more considered approach is to keep using serviceable products and choose durable natural-fibre alternatives as products eventually need replacing.

How can I tell if my bedding contains polyester?

Check the sewn-in fibre-content label or product specification.

Look for terms including:

  • polyester

  • PET

  • recycled polyester

  • microfibre

  • polyester blend

  • poly-cotton.

If you want completely natural-fibre sheets, look specifically for 100% cotton, 100% linen or another clearly identified natural fibre.

Why doesn't Ecodownunder use polyester?

We believe products we put against our bodies every day should be made from natural fibres wherever those fibres can perform the job well.

For bedding, towels and many homewares, natural materials already provide exceptional comfort and performance.

Our approach is therefore simple:

use natural fibres, make products well, keep them for longer and avoid unnecessary plastic.

That's part of what Living with Nature means to us.