Organic Cotton Panty Liners, ranked by PFAS safety
All 4 cotton-based options in our panty liners database, graded Bad to Excellent and ranked safest first. 2 earn a buy-worthy grade.
Kotex
Core Daily Wrapped Liners
cotton, rayon, adhesive (nonwoven blend)
Synthetic adhesive leachables
Limited concern
Fragrance allergens (if scented variant)
Moderate concern
Microplastic shedding from nonwoven backing
Limited concern
PFAS
Limited concern
Lower PFAS concern; standard period-liner materials without disclosed water-resistance treatment.
⚠Risky category by default
Kotex
Wrapped Liners
Cellulose/cotton absorbent core with adhesive backing
Adhesive skin contact sensitization
Limited concern
Fragrance allergens (if present)
Limited concern
Lower PFAS concern for this product type, but Kotex provides no transparency on coating materials.
⚠Risky category by default
Thinx
Leak-Fighting Rotation Set Underwear
Cotton/synthetic blend with waterproof/moisture-wicking coating (unspecified chemistry)
Don't buy until the brand reveals the waterproof coating material; period underwear's leak-fighting layer is a common PFAS concern.
⚠Waterproof or stain-proof treatment
Thinx
Leak-Fighting Cotton Brief Underwear
Cotton blend with waterproof gusset coating (unspecified)
Don't buy until Thinx reveals the gusset treatment material or obtains third-party verification.
⚠Waterproof or stain-proof treatment
See every material: all panty liners grades →