001 / Research · Polyester

Is Polyester Bad for You? What Research Actually Says

Polyester is not acutely dangerous to wear, but there are legitimate, science-backed reasons for concern, especially in activewear. Polyester garments can carry chemical finishes (including PFAS in some performance wear), shed microplastics into water and air with every wash, trap heat and odor against your skin, and irritate sensitive skin. If you sweat in your clothes, the case for natural fibers gets stronger, because heat and moisture increase how much your skin is exposed to whatever is in or on the fabric.

We summarise what the research says, article by article. Read the source and make your own decision.