Most parents meet this subject the same way: a headline, late at night, on a phone.
Textile microplastics are tiny plastic fibres that shed from synthetic fabrics like polyester, nylon and acrylic while clothes are worn, washed and dried. The European Environment Agency ranks textiles as the fourth largest source of unintentional microplastic release in Europe[1]. Clothes made from natural fibres, with no synthetic content, do not shed them.
That is the short version. The longer version is more useful, because the honest answer to "is my child's wardrobe a problem?" depends almost entirely on what the labels say, and labels are written to be skimmed rather than understood.
What a textile microplastic actually is
A microplastic is any piece of plastic smaller than five millimetres. In clothing they arrive as fibres rather than fragments, which is why you will also see them called microfibres.
They are not an additive. Nobody puts them into a garment. They are the garment, breaking down in slow motion.
Why polyester is plastic
Polyester is polyethylene terephthalate, the same polymer family used for drinks bottles. Nylon and acrylic are also petrochemical plastics spun into thread. When you buy a polyester hoodie you are buying woven plastic, and like all plastic it abrades. The difference is that a bottle abrades in a landfill and a hoodie abrades against a child's skin, in your washing machine, and on your drying rack.
Polyester overtook cotton as the world's most used textile fibre in the late 1990s. Global synthetic fibre consumption went from a few thousand tonnes in 1940 to more than 60 million tonnes in 2018[2], according to the European Environment Agency. Most children's clothing sold today contains some.
The European numbers
The European Commission estimates that between 1.6 and 61.1 kilotonnes of microplastics from textiles[1] were released unintentionally into the environment across the EU in 2019. That range is wide because measurement methods still vary, and it is worth saying so rather than quoting the convenient end of it.
Even at the low end, textiles come fourth as a source, behind paints, tyres and plastic pellets. Globally, somewhere between 200,000 and 500,000 tonnes[2] of textile microplastics reach the marine environment every year.
The laboratory figures are more concrete. In a study published in Environmental Science and Pollution Research[3], polyester fleece shed an average of 7,360 fibres per square metre per litre of water in a single domestic wash. Plain polyester shed 87. The difference is the pile: fleece has an enormous cut surface, and every fibre end is a place where a fragment can break away. If you own one fleece jacket and one polyester t-shirt, they are not the same problem.
Recycled synthetics complicate the picture rather than solving it. Fabric made from fibres recycled twice released around 4.3 times more microplastic fibres[6] than virgin polyester, and fibres recycled three times released about 6.2 times more. Mechanical recycling shortens fibres, and short fibres come loose more easily. A recycled polyester garment is a better answer to the waste question and a worse answer to the shedding one.
Why this looks different for a child
Children are not small adults, and the exposure maths does not scale down neatly.
A scoping review of prenatal and early-life exposure published in 2025[4] estimated annual microplastic intake at roughly 9,700 items for infants, 16,900 for toddlers and 28,700 for older children. Measured by body weight, toddlers were exposed to about twelve times the level of adults, 9.7 against 0.8 particles per kilogram per day.
The reasons are ordinary rather than dramatic. Small children spend more time close to the floor, where fibres settle in household dust. They put fabric in their mouths. They breathe faster relative to their size. And they are dressed, undressed and redressed several times a day by someone else, which means more abrasion per garment than an adult wardrobe ever sees.
None of that means a polyester jumper will harm your child. The research on health effects in children is genuinely early, and anyone telling you otherwise is selling something. What the evidence supports is narrower and still worth acting on: children carry a higher exposure load than adults, and the load is reducible.
The honest version of this subject is quieter than the headline version, and more useful.
Where the fibres actually come loose
Washing is the part everyone knows about, and it is real. It is not the only one.
Wearing. Friction releases fibres continuously while a garment is on a body. Knees, elbows, cuffs and anywhere a backpack strap sits are where it happens fastest. This is also the release route that ends up in indoor air rather than in water.
Washing. Mechanical agitation plus detergent plus heat. First washes shed the most, then the rate falls and settles. Higher temperatures, longer cycles and fuller drums all increase it.
Tumble drying. Often worse than washing per cycle. Lint in the filter is the visible portion of what came off, and the invisible portion goes out through the vent.
Line drying, cooler and shorter cycles, and washing full loads rather than half-empty ones all reduce the total. So does simply washing less often, which most children's outerwear tolerates far better than parents assume.
The part that never reaches the washing machine
Almost every article on this subject is really an article about laundry, because water is where the research started and where the measurements are easiest. That focus leaves out the route that matters most inside a home.
Fibres released by friction while a garment is being worn do not go down a drain. They land. Indoor dust acts as the reservoir, and normal household movement lifts particles back into the air, which is why inhalation is now treated as a major exposure pathway[10] alongside ingestion. A systematic review of microplastics in indoor and outdoor air[9] concluded that indoor concentrations are generally higher than outdoor ones, which is the opposite of most people's intuition about air quality.
This is the point where a child's day stops resembling an adult's. A two year old plays on the floor, which is where settled dust sits, and disturbs it constantly by moving through it. They are shorter, so their breathing zone is closer to the reservoir. They put hands and fabric in their mouths between activities. The same fleece produces the same fibres for a parent and a child, but the child is standing much closer to where those fibres end up.
The practical consequences are dull and effective. Damp dusting and vacuuming pick up settled fibres instead of redistributing them. Airing rooms moves particles out. Neither requires buying anything, and both do more for indoor exposure than switching detergent.
How to read a composition label in thirty seconds
The label is where this becomes practical, and reading it is a skill worth ten minutes of your life.
Look for the fibre percentages, usually sewn into a side seam or the back of the neck. Cotton, linen, wool, hemp and silk are natural. Polyester, nylon, polyamide, acrylic, elastane, spandex and Lycra are synthetic. Viscose, modal, lyocell and Tencel sit in between: they are made from cellulose, so they are not plastic, though they are heavily processed.
Then check the parts the percentage does not cover. A garment can be listed as 100% cotton and still carry polyester sewing thread, a plastisol print, a synthetic care label and a nylon zip. The percentage refers to the fabric, not to the finished object.
The elastane detail, and ours
Elastane deserves its own paragraph because it hides in plain sight. It appears in small percentages, usually in ribbing at cuffs, necklines and waistbands, and small percentages read as harmless.
They are not negligible. Research published in Science of the Total Environment[5] found that one square metre of fabric containing just 2% elastane can release up to 28,100 microfibres in its first wash. Elastane holds the surrounding fibres under tension, and tension makes them break.
We use it. The rib at the cuffs and neckline of our garments is 95% organic cotton and 5% elastane. The main jersey and French terry bodies are 100% organic cotton, with no synthetic content.
We could have removed the elastane and written a cleaner sentence. We chose not to, because a rib with no recovery stretches out within a season, and a garment with a gaping neckline gets thrown away long before it has been outgrown, let alone passed on. Five percent in the trim is the trade we decided we could defend. You now know exactly where it is, which is more than most labels will tell you, and you can weigh it yourself.
What a certification does, and what it does not
Certifications are the most reliable shortcut available, provided you know what each one is actually promising.
The Global Organic Textile Standard covers fibre and process. For a product to carry the GOTS "organic" label it must contain at least 95% certified organic fibre[8], and 70% for "made with organic". Independent auditors track the chain from seed to finished goods, and the standard also enforces labour criteria aligned with ILO conventions. GOTS version 7.0 maintains a general ban on toxic and harmful chemicals[7], PFAS included, and tightened the permitted quantity of recycled synthetic fibres specifically because of microplastics and fibre quality.
OEKO-TEX Standard 100 covers the finished product. Every thread, button and accessory is tested against a list of over 1,000 harmful substances[11], and products are sorted into classes by how much skin contact they involve, with the strictest limits reserved for items made for babies and children up to three years. It does not require organic fibre and does not audit the supply chain. A polyester garment can hold OEKO-TEX certification and still be plastic.
Neither certification is a microplastics label, and no certification currently is. What GOTS does for this particular question is indirect but real: by requiring organic natural fibre for the bulk of the product, it rules out most of the shedding at source.
The fabrics we use carry GOTS traceability documented through Transaction Certificates, and our manufacturing partner operates within a valid GOTS certified system. We are not a GOTS certified brand, and you should be sceptical of any label that claims more than its paperwork covers.
What to do with the synthetics already in the drawer
Throwing them out is the wrong move, and it is worth saying plainly because the instinct after reading something like this is to go and empty a wardrobe.
A synthetic garment sheds most in its first washes and then settles into a much lower rate. A jacket your child has worn for two winters is past the steep part of that curve. Replacing it with a new garment means paying the full first wash cost of whatever replaces it, and sending a functional coat to a waste stream where it will break down into the same fibres anyway, just somewhere you cannot see.
Wear out what you own. Apply the thinking to the next purchase instead, and weight that decision towards the items that live against skin and go through the machine every week. That is where the difference compounds.
What is worth doing, and in what order
Buy fewer synthetic garments, starting with the ones that get washed most. A polyester party jacket worn twice a year matters less than the fleece your child lives in from October to March.
Wash less, cooler, and with a full drum. Line dry when the weather allows.
Read the trim, not only the headline percentage.
And treat any brand claiming its clothes are microplastic free with suspicion, including ours if we ever said it. Verifying that claim requires testing every component of the bill of materials, and almost nobody has done it.
On our site: Our materials · Certifications · Glossary
