PFAS are intentionally placed in the crotch region of leggings and yoga pants to make them water-resistant.

“So, this is yoga pants, leggings. They sent 32 pairs of activewear, mostly workout leggings and yoga pants to an EPA certified lab to test for organic fluorine, which is an indicator of PFAs.”

“Interestingly, the crotch area was the most common area to find detectable fluorine, I guess because in leggings, that's the area where you're going to have the most sweat, the most moisture. A lot of women don't wear underwear with these leggings, so they're probably going to make that the most water resistant and stain resistant. When in fact, that's probably the worst place to have these chemicals because that's where there's very absorbent skin from women's genitals, the vagina, the vaginal mucosa is very absorbent. If men are wearing leggings and they're not wearing underwear, I don't know. I guess some men do this. That certainly the testicles, the scrotum, the skin of the genitals for men could be very absorbent as well.”

“a lot of these legging companies the yoga pants legging companies for women will put compounds pfas so perifluoro alkyl compounds forever forever chemicals should be an echo after I say that whatever chemicals they put forever chemicals in the leggings to make them water resistant and they put the highest concentration of those forever chemicals in the crotch region”