Around 50,000 microfibres are lost from a pair of jeans in a single wash, and these fibres have been found in large quantities in water across Canada, even in the Arctic
Source:
https://www.newscientist.com/article/2253421-blue-jeans-pollute-water-by-releasing-50000-microfibres-per-wash/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home