Sustain · Tampons
Tsuno Regular Tampons
Lower PFAS concern; verified organic cotton with MADE SAFE certification, though applicator material unspecified.
Sustain's Tsuno tampons are made from organic cotton and carry MADE SAFE certification, which screens for PFAS. No public disclosure of PFAS testing by the brand itself.
Material
organic cotton tampon (applicator plastic)
Brand disclosure
Third-party verified PFAS-free
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
Tsuno Regular uses organic cotton as the absorbent core, which eliminates synthetic fiber irritants and conventional cotton pesticide residues. The applicator is plastic (material type not publicly specified by brand), which is inert during use but generates minimal waste relative to cardboard alternatives. Organic cotton certification means the crop was grown without synthetic pesticides, reducing both agricultural chemical load and theoretical residue risk in the final product.
The brand's record and disclosure
Sustain is MADE SAFE certified, a third-party standard that screens for over 7,000 harmful chemicals including dioxins, pesticides, and fragrances in feminine care products. The brand explicitly markets PFAS-free status and has undergone independent verification. Public disclosure on applicator composition is limited; most major tampon brands do not detail plastic resin type, which is typical industry practice rather than a red flag specific to Sustain.
How it compares in its category
Organic cotton tampons occupy a premium safety tier compared to conventional brands, which may contain pesticide residues, dioxins from bleaching, or synthetic fibers. Sustain's MADE SAFE certification is more rigorous than industry self-regulation or vague 'natural' claims. Most mainstream competitors do not publish PFAS testing; Sustain's transparency here is above category average.
If you buy it
Change tampons every 4-8 hours per medical guidance to reduce toxic shock syndrome risk (applies to all tampons). Store in a cool, dry place to prevent moisture absorption that could degrade the applicator plastic over years of shelf storage. No special handling is required; use normally. The absorbency rating should match your flow; oversizing increases dwell time unnecessarily.
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 and bleaching byproducts
All cotton tampons face residual dioxin risk from elemental chlorine bleaching used historically in the industry. Organic certification does not guarantee chlorine-free processing; Sustain does not publicly confirm ECF (elemental chlorine free) or TCF (totally chlorine free) bleaching. Exposure levels in typical use are below measurable thresholds but remain a theoretical concern.
Applicator plastic composition and leaching
Sustain does not publicly specify the plastic resin type (polypropylene, polystyrene, or other). No hazardous leaching from applicators has been documented in medical literature for any major brand under normal vaginal pH and temperature conditions. If applicator is virgin polypropylene or polystyrene, leaching risk is negligible.
Pesticide and herbicide residues in cotton
Organic certification prohibits synthetic pesticides and herbicides by definition. Third-party organic audits verify this at the farm level. No residue contamination has been reported in Sustain or other GOTS-certified organic tampons.
Fragrance allergens and irritants
Tsuno Regular is unscented according to product labeling. MADE SAFE certification excludes common fragrance allergens and synthetic musks. No documented fragrance-related sensitivity cases linked to this product are on record.
Toxic shock syndrome (TSS) bacterial amplification
TSS risk is inherent to all high-absorbency tampons regardless of material, driven by wear duration and bacterial overgrowth, not material chemistry. Organic cotton does not reduce TSS risk relative to conventional cotton. Risk is mitigated by frequent changes and awareness, not product selection.
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.
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.