3-Pack BOOST Brief
Brand PFAS statement on record, which we have not verified.
Aisle, formerly Lunapads, says its leakproof layers have no PFAS and that SGS testing found no detectable PFAS. We record that as an unverified brand claim. Mamavation reported no fluorine detected in Aisle (formerly Lunapads) period underwear.
Brand says: “Aisle, formerly Lunapads, says its leakproof layers have no PFAS and that SGS testing found no detectable PFAS.”
We flunk more products than we pass. This one earned its grade. How we grade
Material
organic cotton blend, water-resistant gusset
Brand disclosure
Brand claims PFAS-free
Lab data
No PFAS found in testing
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Microplastic shedding from water-resistant barrier
If the gusset uses polyurethane or synthetic rubber for water resistance, microscopic fiber shedding during washing and wear is possible, though quantified risk to health is unclear. Washing in cold water and air drying may minimize shedding.
What’s reassuring
Brand-stated PFAS-free
The brand states this product is PFAS-free. We have not verified the claim.
No PFAS found in lab test
No PFAS detected in independent testing.
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Azo dyes in organic cotton blend
Organic cotton typically avoids synthetic azo dyes, but finishing processes may still introduce them. No recalls or violations are on record for Lunapads period underwear; organic certification standards generally limit azo use.
Formaldehyde / VOCs
Organic cotton products are less likely to receive formaldehyde-resin wrinkle-resistance or sizing treatments than conventional cotton. No known issue for this product; standard textile handling does not suggest elevated formaldehyde risk.
Source, ATSDR ↗Heavy metals
Organic certification and brand transparency commitments make heavy metal contamination in dyes unlikely. No on-record issues for Lunapads period underwear.
Source, FDA ↗Contact dermatitis from elastic or closure materials
Elastic and fasteners in period underwear are not typically reported as hazard sources for this brand. Individual sensitivity to polyester or rubber elastics varies; pre-wash and patch testing are optional precautions for sensitive skin.
The full breakdown
What it's made of and why it matters
Lunapads BOOST Brief uses an organic cotton blend for the primary fabric, which avoids synthetic dyes and pesticide residues associated with conventional cotton. The water-resistant gusset is the critical component, Lunapads' PFAS-free claim means the water resistance likely comes from physical construction (layering or weaving tightness) or alternative barriers such as polyurethane or silicone rather than fluorinated coatings. Organic cotton blends typically carry lower heavy metal and formaldehyde-resin risk than mass-market alternatives, though finishing processes for all textiles warrant attention.
The brand's record and disclosure
Lunapads has a documented public stance claiming PFAS-free materials, though as with all brand claims, independent third-party verification is not noted in public records reviewed here. The company is known for transparency in sustainability messaging and organic material sourcing. No significant product safety recalls or formaldehyde/azo dye violations are on record for this brand in the period underwear category. Disclosure of specific finishes or barrier materials for the water-resistant gusset is not widely available in consumer-facing materials.
How it compares in its category
Most mass-market period underwear relies on PFAS-based water-resistant coatings for leak prevention; Lunapads' PFAS-free design places it in a smaller, more transparent segment. Organic cotton reduces the typical pesticide and synthetic dye burden compared to conventional cotton alternatives. Period underwear in general carries lower chemical exposure risk than heavily treated textiles (e.g., performance athletic wear with flame retardants), since absorbent fabrics do not require flame-retardant additives. The main differentiator here is the documented commitment to PFAS avoidance rather than superior inherent material safety.
If you buy it
Wash before first use to remove any residual finishing compounds. Machine wash warm in mild detergent and air dry to preserve elasticity and water resistance; tumble drying at high heat may degrade the water-resistant gusset over time. Replace if the gusset begins to absorb liquid noticeably, indicating barrier degradation typically after 1-2 years with normal use. Inspect seams and elastic regularly for breakdown, as loss of fit can allow leakage independent of material hazards.
What we don’t know
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- Independent test found none
- Brand statement
- Lunapads has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
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.