Microplastic from clothing in the washing machine
Short answer: Synthetic fibres shed tiny pieces of plastic in every wash. Bamboo viscose is cellulose and sheds no plastic, though it sheds fibres like every other fabric.
Where the microplastic comes from
Polyester, nylon, acrylic and fleece are plastic. In the wash small pieces break off the surface and rinse away with the water. Fleece and old, worn clothing shed the most, while new dense fabric sheds less.
What cellulose fibres do
Bamboo viscose, cotton and lyocell also shed fibres in the wash, but they are cellulose and break down in nature. That is why they do not count as microplastic. See bamboo clothing for women.
How to reduce the release
Wash less often and at a lower temperature, load the machine well so clothes rub less, and use a laundry bag that catches fibres. See bamboo underwear for women and bamboo t-shirts for men.
Frequently asked questions
Does all clothing shed fibres in the wash
Yes. The difference is whether the fibres are plastic or cellulose.
When does a garment shed most
In the first few washes and again once the fabric starts to wear.
Does a filter on the drain help
Yes, if it is fine enough. A fibre catching laundry bag is the easiest solution at home.