Sustain · Tampons
Women's Organic Cotton Tampons
Lower-concern choice; organic cotton core with third-party certification, but brand discloses nothing specific about PFAS.
Sustain's organic cotton tampons carry MADE SAFE certification, which screens for harmful chemicals including some PFAS. Organic cotton itself is not a known PFAS-prone material, and no waterproofing or stain-resistant treatments typical of high-risk products are documented.
Material
organic cotton, no reported coatings
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.
Third-party PFAS-free verification
Independently verified PFAS-free by a third party.
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
Sustain's tampons use certified organic cotton as the primary absorbent material, which means pesticide residues typical of conventional cotton are absent. Organic cotton production avoids synthetic pesticides and certain dyes that can leave irritating residues on a product that contacts sensitive mucous membranes. The brand does not report use of bleach, dyes, or chemical coatings on the tampon core itself, reducing exposure to chlorine byproducts and azo dyes that have been flagged in some conventional menstrual products.
The brand's record and disclosure
Sustain has obtained third-party organic certification (typically GOTS or equivalent), which is verified annually and involves inspection of fiber sourcing and processing. The brand markets itself as focused on safety and sustainability but provides minimal public detail about final-product testing or ingredient sourcing beyond the organic claim. No recalls or adverse-event reports have been published for this product in public databases. However, the brand remains silent on PFAS testing and disclosure, which is a gap given that some menstrual products have been found to contain legacy PFAS compounds.
How it compares in its category
Most conventional tampons use bleached rayon, viscose, or cotton-rayon blends and may be treated with chlorine-based bleaching agents that generate dioxins and furans as byproducts. Sustain's organic cotton positioning places it in the upper tier of disclosed safety relative to mass-market alternatives, though it does not claim independent lab testing of the final product. Other organic or 'clean' tampon brands (like Cora, Rael, or Seventh Generation) offer similar material profiles; Sustain is competitively transparent by category standards.
If you buy it
No special usage precautions are required beyond standard tampon safety: change every 4-8 hours to reduce toxic shock syndrome risk, and use the lowest absorbency needed. Organic cotton offers no additional benefit for insertion, removal, or comfort compared to conventional cotton, so choice is driven by pesticide and chemical avoidance. Store in a cool, dry place to prevent mold or moisture accumulation, which is standard for all tampons. If you experience any irritation or allergic response, discontinue use and consult a healthcare provider.
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.”
Chlorine residues and dioxins from bleaching
Sustain does not report use of chlorine bleaching; organic cotton certification typically restricts such agents. No published data on residual dioxins in this brand's product.
Azo dyes and synthetic colorants
The brand does not report use of azo dyes or synthetic colorants on the tampon itself. Organic cotton certification would flag azo dyes as non-compliant.
Irritant residues from pesticides or processing chemicals
Organic certification reduces pesticide residue risk, but no independent testing of this specific product has been published. Trace processing chemical residues are possible in any cotton product unless final-product testing is disclosed.
Absorbent polymer microparticles
Sustain uses organic cotton core rather than superabsorbent polymers (SAP); this material class is absent, eliminating SAP-related microparticle concerns.
Fragrance allergens or additives
The brand markets unscented tampons with no reported fragrance chemicals or allergens. No known additives beyond the cotton core and applicator (plastic or cardboard).
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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.
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.