August 09, 2021 1 min read

Nylon, acrylic, polyester and other materials ― which are used to make workout pants, tops, fleeces and other leisure clothing ― are all petroleum-based plastics. They’re spun into tiny threads and woven together to make fabric. When people clean these clothes in a washing machine, microfibers are released and end up in wastewater treatment plants. From there, they travel to rivers, lakes and oceans. 

Read the entire article at the HuffPost.