PFAS score
Proof · Period Underwear
Period Period Underwear
Lower-concern option if PFAS-free claim holds, but unverified by third party.
Proof makes an explicit PFAS-free claim for their period underwear, which addresses the main water-repellent coating/waterproofing concern in leak-protection textiles. However, the claim lacks third-party certification (MADE SAFE, OEKO-TEX) to independently confirm the waterproof layer formula.
Brand says: “Proof states their absorbent layers and waterproof backing are PFAS-free”
The safe swap
JAMA Organic
LOLA Organic Cotton Period Underwear
100/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Organic cotton gusset + proprietary waterproof layer
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
period care is a category where PFAS exposure is more common.
Brand-stated PFAS-free
The brand states the product is PFAS-free (self-declared).
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Period Underwear
JAMA Organic
LOLA Organic Cotton Period Underwear
Organic cotton with moisture-wicking gusset
Lower PFAS concern, organic cotton base with no waterproof claims, but brand doesn't explicitly address PFAS.
✓Verified PFAS-free by a third party
JAMA Organic
Organyc Certified Organic Cotton Disposable Period Underwear for Sensitive Skin
certified organic cotton with absorbent core
Lower concern, organic cotton base suggests minimal PFAS risk, but no explicit PFAS statement limits confidence.
✓Verified PFAS-free by a third party
Ruby Love
Women's Hipster Period Underwear
organic cotton with waterproof coating
Lower concern, PFAS-free verified; buy with confidence.
✓Lab test found no PFAS
More period underwear grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.