the study’s authors noted. They tested 30 different school uniforms and all of them contained some level of fluorine

     Often called “forever chemicals,” PFAS (per- and poly-fluoroalkyl substances) represent a group of compounds that do not break down naturally with the ability to remain in the environment almost indefinitely and to build up in people’s blood. Manufacturers commonly use them to make products waterproof, non-stick or, as in the case of school uniforms, stain resistant. […]