All synthetic textiles, whatever their origin, lose plastic fibers during washing, which end up in nature via wastewater. 
 
You can easily avoid this with the Guppyfriend laundry bag, as it works in several ways: it reduces fiber breakage during washing, protects your clothes and filters out microplastic particles before they end up in wastewater. So it's good for you, your clothes and the environment. 
 
 
This bag is made from high-tech filter material that doesn't shed fibers on its own and protects your clothes.