I've begun to avoid it as it is another carcinogen. Though the price point is appealing, I don't think it's worth the risk.
Contraceptive efficacy of polyester-induced azoospermia in normal men - PubMed
The contraceptive effect of a polyester sling applied to the scrotum was studied in 14 men. The suspensor was worn for 12 months. Follow-up investigations comprised periodic check of semen character, testicular size, rectal-testicular temperature difference, serum reproductive hormones and...
Effect of different types of textile fabric on spermatogenesis: an experimental study - PubMed
The effect of different types of textile fabric on spermatogenesis was studied. Twenty-four dogs were divided into two equal groups, one of which wore cotton underpants and the other polyester ones. Seven dogs wearing nothing were used as controls. The underwear was fashioned to fit loosely in...
Food Additives and Child Health
Increasing scientific evidence suggests potential adverse effects on children’s health from synthetic chemicals used as food additives, both those deliberately added to food during processing (direct) and those used in materials that may contaminate food as part of packaging or manufacturing...