Aunt Flow · Period Pads
Aunt Flow Organic Cotton Menstrual Pads with Wings
Lower PFAS concern for the cotton itself, but adhesive/backing not disclosed, moderate transparency gap.
Aunt Flow's organic cotton pads avoid Teflon-type coating and Teflon-family coating coatings typical of some competitors. However, the brand does not publicly disclose the chemical composition of the adhesive or waterproof backing layer, which are common sources of PFAS in period products.
Shop Aunt Flow on Amazon →Material
organic cotton core; adhesive backing unspecified
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
period care is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Aunt Flow pads use certified organic cotton for the absorbent core, which eliminates synthetic pesticide residues common in conventional cotton (typically treated with ~16% of global pesticide volume despite occupying 2.5% of farmland). The adhesive backing and wing material are not publicly specified on the product or company site. Organic cotton itself poses minimal chemical risk; the adhesive chemistry and any backing polymers are the unknown variables here.
The brand's record and disclosure
Aunt Flow markets sustainability and organic credentials prominently but does not publish a materials transparency report or adhesive/backing specifications. The company has no documented recalls or regulatory violations on record. No third-party certifications beyond organic cotton claim are listed (e.g., no Cradle to Cradle, no explicit chlorine-free elemental chlorine-free [ECF] or totally chlorine-free [TCF] bleach statements for the final product). This is a transparency gap typical of smaller period-care brands, not a red flag of hidden harm.
How it compares in its category
Organic cotton pads occupy the premium segment; Aunt Flow sits alongside brands like Cora and Seventh Generation. Most conventional pads use bleached wood pulp (dioxin risk if not TCF) and synthetic super-absorbents (sodium polyacrylate, largely inert). Aunt Flow's organic cotton core is a genuine material upgrade over conventional; however, adhesive and backing materials remain unspecified across nearly all brands in this category, making direct comparison impossible. Wings add surface area and potential for adhesive contact with sensitive skin, though formulation varies.
If you buy it
Change pads every 4-8 hours to minimize bacterial overgrowth and skin maceration risk, regardless of absorbency claims. Discontinue use immediately if itching, burning, or rash develops; this signals either adhesive sensitivity or moisture accumulation, not product defect. Store in a dry location to prevent mold on the organic cotton before use. If wings cause chafing, trim or avoid; no safety risk, just comfort.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Dioxins from bleaching (wood pulp / non-cotton components)
Organic cotton core itself is not bleached in the same way as wood pulp; however, if the pad incorporates bleached rayon, viscose, or pulp layers (not stated), conventional elemental chlorine-free [ECF] bleaching poses residual dioxin risk. No evidence of TCF (totally chlorine-free) certification provided. Likely minimal given organic positioning, but unconfirmed.
Adhesive dermatitis and fragrance allergens
Adhesive formulation unknown; no disclosure of whether synthetic latex, tackifiers, or fragrance compounds are used. Menstrual pads with wings contact sensitive vulvar skin for extended periods. Aunt Flow does not advertise fragrance-free status explicitly, creating risk for contact sensitization in allergic users, though not a defect-level concern for the general population.
Microbial contamination from organic cotton moisture retention
Organic cotton absorbs and retains moisture more readily than synthetic super-absorbents; this increases risk of bacterial/fungal overgrowth if pads are not changed frequently. This is a use-pattern risk, not a manufacturing defect, and applies to all high-cotton pads. No recalls or outbreak data linked to Aunt Flow.
Heavy metals or contaminants in organic cotton dyeing/processing
Organic cotton production avoids synthetic pesticides but does not prohibit metal-based dyes or finishing agents. No specific testing or certification (e.g., Oeko-Tex) is claimed for Aunt Flow pads. Given organic certification and brand positioning, metal burden is expected to be low, but unverified.
Undisclosed synthetic polymers in adhesive or backing layer
Wing adhesive and backing materials are completely unspecified; they may contain acrylates, EVA, or other polymers with trace monomers or plasticizers. No evidence of harm, but lack of transparency is the only material concern for this product.
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.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Period Pads
Organyc
Corman Organyc Certified Organic Cotton Feminine Pads
Certified organic cotton, no synthetic coatings disclosed
Lower-concern choice; organic cotton without disclosed coatings reduces PFAS risk, though brand offers no explicit assurance.
✓Verified PFAS-free by a third party
Organyc
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Lower-concern choice; organic cotton base + explicit PFAS-free positioning + third-party certs.
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Organyc
The Honey Pot Company Organic Herbal Regular Pads
organic cotton, cellulose core
Lower-concern period product; organic cotton pads unlikely to contain PFAS, though brand remains silent on testing.
✓Verified PFAS-free by a third party
More period pads 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.