Published June  14, 2021

What are microplastics?

Microplastics are plastic particles smaller than 5 millimeters released from any type of plastic into the environment. Plastic fragments smaller than 1 micrometer, resulting from the degradation of plastic objects, are referred to as nanoplastics.

Microplastics are divided into two categories according to their origin:

Primary microplastics (15-31%)

primary microplastics found in the ocean

Plastic bits that are directly released into the environment as small fragments.

  • Textile microfibers
  • Microplastics released from tires
  • City dust
  • Plastic beads in beauty products

Secondary microplastics (69-81%)

secondary microplastics found in the ocean

Larger plastics that break down into small particles over time through the process of fragmentation.

  • Plastic bottles
  • Fishing nets
  • Plastic bags
  • Plastic food containers

Microplastics & fashion

According to The International Union for Conservation of Nature (IUCN) 35% of primary microplastics that end up in the oceans come from textiles, 28% from tires and 24% from city dust.

Synthetic fibers used in clothing, such as polyester, nylon, lycra and acrylic, are made of plastics which means that they also release microplastics into the environment in the form of microfibers.

How are microplastics released from clothing?

microplastics that release when washing


The release of plastic microfibers during washing of synthetic textiles in a laundry machine is mainly caused by the mechanical and chemical actions that occur during the washing process.

On average, 9 million plastic microfibers are released per a single laundry. [1]

microplastics release when wearing


Natural body movement creates friction which causes a release of microplastics from clothing made of synthetic fibers.

According to a recent study, a synthetic coat weighing approx. 1 kilogram releases 1,200 microplastic fibers every hour of use. [2]

How much microplastics are released from one polyester shirt?

If you wear a polyester t-shirt everyday for 10 hours and wash it once a week, you will release approximately 562 million plastic microfibers a year.

Where do microplastics end up?

microplastics found in our drinking water


The majority of potable water in the world, whether bottled or tap water, is contaminated with microplastics.

Bottled water, for instance, on average contains 4 plastic bits per liter.

They have also been found in other beverages, such as beer, milk and soda drinks.

Microplastics found in our food


On average, we ingest 50,000 microplastics per year through water and food.

Fish on the market with microplastics

Microplastics have been found in different amounts in some of the most commonly consumed products, such as salt, sugar, rice, fish, shellfish.

microplastics found in air


We are breathing in up to 68,000 plastic microfibers per year. [5] They are typically released during the use of synthetic clothing and home textile.

Researchers discovered that 22,000 tons of microplastics are released into the air across the US each year. [6]

What is the impact of microplastics on human health?

Microplastics and nanoplastics enter the human body mainly through ingestion and inhalation, and in a smaller amount also through the skin through sweat glands, hair follicles and wounds. Nanoplastics, due to their small size, can cross cellular membranes and affect the functioning of cells in fish. However, we do not know yet how nanoplastics affect human health. [7]

Some types of plastics contain highly toxic ingredients that are classified as carcinogenic, mutagenic or toxic for reproduction, and their long-term impact is still being researched by scientists. At this moment, there is still not enough evidence and connection between plastics and specific diseases.

Dr. Shanna Swan from the Icahn School of Medicine in New York st udied the influence of plastics on fertility and discovered that certain chemical compounds used in plastics, such as phthalates and bisphenol A (BPA), have a negative effect on fertility in men, as they cause a lower production of testosterone which results in fewer sperms. According to Swan's research, male sperm count has declined by 50% in the past 50 years.

Is fashion threatening to our health?

fashion is harming workers

Some textile workers who were continuously exposed to synthetic fibers in the textile manufacturing, inhaling plastic microfibers, suffered with respiratory and lung problems, including coughing, shortness of breath and reduced lung capacity. 

Polyethylene terephthalate (PET), the same ingredient to make plastic bottles, polyester and other synthetic fibers, contains antimony trioxide. Antimony trioxide is a catalyst used in the polymerization process used to produce PET. Antimony can be leached from PET when heated and is listed by the International Agency for Research on Cancer as “possibly carcinogenic to humans”.

In addition to PET, chemicals used in synthetic textile dyes can also be a potential threat to human health and the environment. Certain types of dyes, for instance azo dyes, release aromatic amines which are carcinogenic.

"Shedding of fiber fragments into the environment is not only about the physical presence of non-biodegradable fiber fragments in the environment; it is also about the chemicals that are carried along the fiber fragments." [8]

What is their impact on nature?

Microplastics have a great impact on both, flora and fauna. The most affected animals, that scientists know of up to this day, are fish, shellfish, sea turtles and birds. According to a new study, ingestion of microplastics causes several health issues in wild fish, such as liver damage, neurotoxicity and reduced fertility. [9] 

microplastics are harming our ocean
From a microscopic organism to our plate

Microplastics in the ocean can get eaten by plankton. Plankton are marine organisms, usually microscopic but some species are a larger size (e.g. jellyfish), that drift with the current and feed on marine debris. Other marine species feed on plankton which creates a chain of microplastics beeing passed on from one organism to another, starting with plankton ingesting microplastics, through fish eating the plankton which then ends up on our plate.

plankton eats microplasticsPlankton that eat microplasticsFish eat plankton that eat microplasticsPeople eat fish that eat plankton that eat microplastics
Microplastics in the ocean

Plastics and microplastics that are heavier than seawater sink to the bottom of the ocean. However, around 60% of the plastic produced is less dense than seawater which means that the majority of plastic waste ends up floating on the surface accumulating in patches. [10] Studies estimate that up to 268,000 tons of microplastics are floating in the oceans. [3] 

Great Pacific Garbage Patch is the world’s largest collection of marine
The Great Pacific Garbage Patch

The Great Pacific Garbage Patch is the world’s largest collection of marine debris located in the North Pacific Ocean between California and Hawaii. The garbage patch takes up 1.6 million kilometers on the ocean’s surface and also goes deep down into the ocean. Studies discovered that microplastics could contribute to up to 10% of the garbage patch. [11]

Dianna Parker from National Ocean Service says: “If you tried to clean up less than 1% of the North Pacific Ocean it would take 67 ships one year to clean up that portion... Until we prevent debris from entering the ocean at the source, it's just going to keep congregating in these areas.”

Microplastics in soil

Microplastics have become a threat to biodiversity and all types of ecosystems, however we are still lacking enough scientific evidence. Soil ecosystems receive more and more microplastics from the environment which means that new threats are emerging. Experiments have shown that the presence of microplastics in soil reduces its fertility, pH level, and also most common species such as ants, moths,  butterflies, flies and mites. Since plastic production and the amount of microplastics in the environment is still growing, this could have severe consequences on agriculture.

The world's highest mountain with microfibers

Scientists from the Plymouth University in the United Kingdom analyzed snow samples from Mount Everest and discovered that even the world's tallest peak is contaminated with microplastics.

They detected most microplastics accumulating in the areas where people camp, containing around 30 pieces of microplastics per quart of water. A large portion of the microplastics found was made of synthetic fibers such as polyester, nylon, and acrylic. These fibers are commonly used in hiking and camping gear.

The future of plastics

The production of polyester, as well as the overall plastic production, is still steadily growing. The plastic industry is not only selling us their plastic products, but also new environmentally-friendly solutions, making us believe we are choosing better, more sustainable options.

Some of these false innovative solutions include:

Recycled polyester

THE TRUTH: Recycled polyester sheds as much plastic microfibers as regular polyester.
WHAT IS IT GOOD FOR? Recycled polyester reduces the negative environmental impact of manufacturing new polyester textile.

Microplastic filter for washing machine

THE TRUTH: If microplastics are not released during washing, they are released during the use and after they have been disposed of through the process of fragmentation.
WHAT IS IT GOOD FOR? It stops microplastics from entering directly into the wastewater system. However, it is only a temporary solution.

Pectin finishings reducing the release of plastic microfibers from synthetic textiles

THE TRUTH: Same as with the microplastic filter. Synthetic textile will become plastic waste eventually after it has been disposed of.
WHAT IS IT GOOD FOR? Pectin based finishings reduce the amount of microplastics released from polyamide fabrics, such as nylon, by 90% compared to untreated fibers. However, it is only a temporary solution.

"If we keep using plastics the way we do now, by 2050 there could be more plastics in the sea than fish by weight."

- Ellen MacArthur Foundation

What can we do to help with plastic pollution?

As individuals

You can help stop pollution

Avoid using unnecessary plastics, such as single use plastics (bags, bottles, containers) and synthetic textile, and educate people in your circle.

As a society

As a community we can stop pollution and polyester production

Public demand a change in large companies that use and/or produce plastics, and are the principal source of plastic pollution.

When purchasing a new product, ask yourself first: 

Will this product leave a trace in the environment?

biodegradable and leaves no trace when biodegrading




Think twice! Do you really need it? Is it worth polluting our planet?

Do more research! Read our article 'What is sustainability?'

Buy it if you need it, and recommend it to others!

Plastic Soup Foundation: Ocean Clean Wash
2 Environ. Sci. Technol. 2020, 54, 6, 3288–3296
3 Eriksen et al. (2014) and Sebille et al. (2015)
4 Scientific Reports |5:14340 | DOI: 10.1038/srep14340
5 Plastic Soup Foundation: Ocean Clean Wash
6 Constraining the atmospheric limb of the plastic cycle
7 J.A. Pitt, J.S. Kozal, N. Jayasundara, A. Massarsky, R. Trevisan, N. Geitner, et al.: Uptake, tissue distribution, and toxicity of polystyrene nanoparticles in developing zebrafish, Aquat. Toxicol., 194 (2018), pp. 185-194
8 Textile Exchange: Preferred Fiber Material Market Report 2020
9 Science of The Total Environment Volume 717, 15 May 2020, 134625
10 Andrady, A. L. Microplastics in the marine environment (2011)
11 The Ocean Clean Up: The Pacific Garbage Patch



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