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Plastic-Free Rating
Feminine Care
Mainstream Brand
Feminine Care·THINX

Period Underwear (Hiphugger)

B
PFR Grade
Good — mostly plastic-free with minor concerns
OEKO-TEX Standard 100 certified. No PFAS (after 2020 reformulation). THINX is one of the most popular period underwear brands. Reusable for 2+ years.
PFR Recommended

Period underwear (Hiphugger style). OEKO-TEX Standard 100 certified. No PFAS (after 2020 reformulation). Reusable for 2+ years.

Score Breakdown

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.

Materials
7
Packaging
7
Transparency
8
Durability
8

This is a rating of this specific product only — not the company. Other products from this brand may score differently.

Last updated: April 6, 2026

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Moderate Exposure Risk — Why This Product Category Matters

Conventional tampons and pads contain pesticide residues (cotton is one of the most heavily pesticide-treated crops), dioxins from chlorine bleaching, and synthetic fragrances. The vaginal mucosa is one of the most absorptive surfaces in the body.

Synthetic Plastic Content
60%
synthetic plastic by weight

Why We Rated It This Way

THINX reformulated their period underwear in 2020 to remove PFAS. Now OEKO-TEX Standard 100 certified. Reusable for 2+ years, replacing hundreds of disposable pads and tampons. A solid reusable period care option.

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