Organic Cotton Period Underwear
Period underwear with organic cotton outer layer. Thinx reformulated their products after PFAS concerns were raised in 2023.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
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Last updated: April 6, 2026
Conventional tampons and pads are made from conventionally grown cotton (one of the most pesticide-intensive crops) and synthetic materials. The vaginal mucosa is highly absorptive. PFAS, dioxins from chlorine bleaching, and pesticide residues in conventional feminine care products are absorbed directly into the bloodstream.
Why We Recommend This Product
Thinx's organic cotton period underwear is a sustainable alternative to disposable products. Important note: Thinx faced PFAS concerns in 2023 and has since reformulated. Verify the current product is PFAS-free before purchasing.
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