Anigan · Period Underwear
hannahpad USA Organic Brief Light Period Underwear Comfort
Lower PFAS concern given organic cotton base, but moisture barrier coating source remains undisclosed.
Hannahpad USA's organic briefs are GOTS-certified and built on organic cotton, which typically avoids PFAS. However, the brand does not publicly disclose whether the gusseted moisture-wicking layer uses a fluorine-based water-repellent coating treatment.
Material
organic cotton, gusseted fabric with undisclosed moisture-wicking coating
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
Hannahpad USA briefs use organic cotton as the primary fabric, which eliminates synthetic pesticide residues common in conventional cotton. The gusseted moisture-wicking layer is the critical unknown: its chemical composition (likely a synthetic polymer coating or finish) is not publicly disclosed by Anigan. This coating is essential for fluid absorption and odor control, but without disclosure, its potential to leach chemicals during wear or washing cannot be fully assessed. Organic certification applies to the cotton fiber itself, not necessarily to finishes or dyes applied afterward.
The brand's record and disclosure
Anigan (Hannahpad USA's parent) has not published detailed material safety data, ingredient lists for coatings, or third-party testing results for this product line. The brand does not appear on major transparency databases (Cradle to Cradle, GOTS detailed reports, or SafetyWorks) for period underwear specifics. PFAS testing by independent sources has shown mixed results across period underwear brands; Anigan's silence on their own testing is notable in an industry where some competitors (e.g., Knix, Thinx) have begun disclosing PFAS levels. No major recalls or contamination incidents are on record for this product.
How it compares in its category
Hannahpad sits in the mid-transparency tier of period underwear. Brands like Knix and Thinx have published PFAS test data and material sourcing; conventional period pad makers rarely disclose coating chemistry. Organic cotton positioning is a genuine advantage over most conventional period underwear, though many competitors also offer organic options. The undisclosed moisture-barrier coating is a shared industry practice, making Hannahpad typical rather than exceptional in this regard.
If you buy it
Wash in cool water with mild detergent before first use and after each wear to minimize any coating leachate exposure. Avoid high heat (dryer, hot water) which can degrade fabric finishes and increase off-gassing of volatile compounds from the coating. Replace after signs of pilling, coating degradation, or elastic failure (typically 12-24 months of regular use). If you notice odor that persists after washing or skin irritation, discontinue use, as it may indicate coating breakdown or microbial colonization in the moisture layer.
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.”
Undisclosed moisture-wicking coating (synthetic finish)
Anigan does not publicly identify the chemical composition of the gusseted coating. Moisture barriers in period underwear are typically polyurethane, polyester-based, or silicone finishes; any of these can leach oligomers or residual monomers, especially during initial use or if degraded by heat or detergents.
Formaldehyde resin finishes (dyes, wrinkle-resistance, water-proofing)
Organic cotton certification reduces risk, but synthetic dyes and water-resistant coatings applied to organic fiber can still contain formaldehyde-releasing resins. No specific testing or reporting on this product is available; standard practice in period underwear manufacturing makes low-level exposure plausible but not confirmed.
Azo dyes and heavy metals in pigments
Organic cotton itself is not treated with synthetic azo dyes during growth, but the finished product may use azo-based colorants or pigments in printing or dyeing. Hannahpad's product images suggest dark colors, which carry higher historical risk; no third-party color-fast or metal testing on record.
Microplastic shedding from synthetic coating and elastic
The undisclosed synthetic moisture-barrier and elastic waistband can shed microfibers during wear and laundering. Organic cotton does not shed microplastics itself, but the composite product does. Frequency and volume are not quantified in any public study of this specific brand.
Bacterial or fungal growth in moisture-trapping layers if not dried or maintained
Period underwear by design retain moisture; if not air-dried fully between uses or washed regularly, the coating-cotton interface can harbor pathogenic bacteria or mold. This is a use-and-care hazard rather than a manufacturing one, but relevant to product safety in practice.
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.
More period underwear 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.