Aunt Flow · Tampons
Aunt Flow 100% Organic Cotton Tampons
Lower-concern choice, 100% organic cotton tampons have no typical PFAS application vector.
Aunt Flow's tampons are made from 100% organic cotton with no coatings, waterproofing, or nonstick treatments mentioned or typical for this product category. Tampons inherently do not require PFAS-prone treatments like water repellency or grease resistance.
Shop Aunt Flow on Amazon →Material
100% organic cotton
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 tampons are 100% organic cotton, meaning they are grown without synthetic pesticides, herbicides, or GMO seeds. Organic cotton eliminates the residual pesticide burden present in conventional cotton tampons, which can accumulate in a product worn internally for extended periods. The lack of synthetic fibers or rayon (sometimes used as absorbent core material) removes the processing chemicals and potential microfiber shedding associated with those materials. This straightforward material composition avoids the bleaching or chlorine-based processing agents that may leave trace chlorine byproducts in non-organic alternatives.
The brand's record and disclosure
Aunt Flow does not publicly disclose PFAS testing or manufacturing standards on their website, which is a notable gap in transparency for a brand marketing to safety-conscious consumers. However, the company does hold organic certification (typically third-party verified), which implies adherence to organic textile standards that restrict synthetic chemicals at the fiber level. No product recalls, health complaints, or regulatory actions against Aunt Flow tampons have been publicly reported. The brand's positioning around organic and non-bleached materials aligns with consumer safety expectations, though explicit chemical testing disclosure would strengthen credibility.
How it compares in its category
Organic cotton tampons like Aunt Flow occupy a safety-conscious premium segment. Most conventional tampons use rayon or rayon-cotton blends, which require industrial processing with chlorine bleach and can leave dioxin and furan residues (typically at regulatory safe levels, but still present). Unbleached or oxygen-bleached alternatives reduce this exposure. Aunt Flow's all-organic positioning avoids pesticide residues from the fiber stage, a meaningful advantage for a product with vaginal contact. The trade-off is cost and availability compared to mass-market brands.
If you buy it
Use as directed and replace every 4-8 hours per standard tampon safety guidance to reduce toxic shock syndrome risk, a concern for all tampons regardless of material. Store in a dry environment to prevent mold or bacterial growth. Because organic cotton is more porous than some bleached alternatives, these may require slightly more frequent changes if you have heavy flow; adjust based on personal experience. Check the applicator material (usually cardboard for organic brands) for integrity before use; discard if damaged.
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.”
Pesticide residues (conventional vs. organic)
Conventional cotton tampons may retain trace pesticide residues from cultivation. Aunt Flow's organic certification rules out synthetic pesticides at the fiber source, making this hazard effectively eliminated for this product, though no independent testing has been published.
Chlorine bleach byproducts (dioxins/furans)
Unbleached or oxygen-bleached organic cotton (standard for organic brands) avoids the chlorine-based bleaching used in conventional tampons. No regulatory concern reported for Aunt Flow specifically, and organic standards prohibit chlorine processing.
Synthetic fibers and microfiber shedding
100% organic cotton eliminates rayon, polyester, or plastic-based absorbent cores. This removes any risk of microfiber shedding or synthetic polymer exposure in the vaginal environment.
Toxic shock syndrome (TSS) risk
TSS risk is inherent to all tampon use regardless of material and is tied to wear time and frequency of changes, not fiber type. Material composition (organic or conventional cotton) does not independently alter TSS risk; proper use protocol does.
Vaginal irritation from residual processing chemicals
Organic certification limits residual bleach and synthetic sizing agents. No complaints or adverse event reports specific to Aunt Flow have been publicly documented, and the brand markets to sensitive-skin consumers without reported safety issues.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 85% 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 Tampons
Seventh Generation
Organic Cotton Tampons Applicator
organic cotton (tampon & applicator core); cardboard applicator
Lower-concern buy, organic cotton & MADE SAFE cert reduce PFAS risk, though brand is silent on the topic.
✓Verified PFAS-free by a third party
Lola
Organic Cotton Tampons
organic cotton (no synthetic coatings)
Lower concern, uncoated organic cotton with transparent PFAS-free positioning and third-party certification.
✓Verified PFAS-free by a third party
Cora
Organic Tampons with Applicator
organic cotton tampon with cardboard/plastic applicator
Lower-concern choice; organic base material and MADE SAFE cert suggest thoughtful sourcing, but no explicit PFAS commitment.
✓Verified PFAS-free by a third party
More tampons 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.