Saalt Leak Proof Period Underwear High Absorbency - Super Soft Modal Comfort Briefs : Target
Skip until brand discloses waterproof treatment chemicals used.
Saalt modal period underwear uses an undisclosed waterproof coating to achieve leak-proof function. Brand provides no PFAS disclosure or testing data, raising concern about water-repellent coating treatment chemicals.
The better-graded swap
Modibodi
Modibodi Basic Mid-Rise Brief Black
90/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Modal fabric with undisclosed waterproof/leak-proof treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Saalt Leak Proof Period Briefs : Target is made of, ingredients and materials
The product uses modal fabric as its primary material. Modal is a cellulose-based synthetic fiber derived from beech wood pulp, and the fiber itself carries no established acute hazards in finished textile form. The concern here is entirely the waterproof/leak-proof treatment applied to the gusset or full lining. Saalt has not disclosed the chemical class or specific compounds used for this water barrier. Standard practice in period-care apparel involves PFAS-based coatings (such as polyurethane laminate with fluorinated additives), which is why the waterproof layer draws scrutiny rather than the modal itself.
What’s concerning
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
PFAS
The waterproof/leak-proof treatment is not named in public materials. Industry standard for this application is PFAS-based polyurethane laminate; Saalt has not contradicted this assumption or provided an alternative chemical class.
Source, ATSDR ↗Coating degradation and fiber shedding
Repeated washing and heat exposure can cause waterproof coatings to flake or delaminate, potentially releasing micro-particles of the coating material into the wash stream. This is a mechanical hazard rather than chemical toxicity, but indicates the product has a finite effective lifespan.
Sensitization or irritation from barrier chemicals (contact risk)
If the waterproof treatment is fluorinated PFAS or uses isocyanate-based polyurethane, direct prolonged contact with skin during menstruation (a naturally permeable, sensitive state) carries a theoretical risk of contact sensitization or irritation. No specific adverse-event reports for Saalt are on record, but the undisclosed chemistry prevents assessment.
What’s reassuring
Formaldehyde / VOCs
Modal production does not inherently require formaldehyde-based dye fixation, and no recalls or test failures for formaldehyde are on record for Saalt products. However, standard dye-fixing resins in modal textiles sometimes contain formaldehyde releasers; Saalt does not publish OEKO-TEX or similar dye-safety certifications that would rule this out.
Source, ATSDR ↗Azo dyes and colorant allergens
Saalt products are not known to use banned azo dyes. The brand does not restrict synthetic dyes or publish dye safety data. Risk is not elevated compared to mainstream modal apparel, but unverified.
How is this PFAS grade calculated?
The brand's record and disclosure
Saalt does not publicly disclose the identity of its waterproof treatment chemicals on product pages, care instructions, or published safety documentation. The brand has not pursued third-party textile certifications (such as OEKO-TEX or bluesign) that would validate chemical restrictions. No recalls or reported contamination events are on record for this specific product. The silence on waterproof chemistry is a disclosure gap rather than evidence of a problem, but it prevents independent verification of PFAS avoidance.
How it compares in its category
Period underwear in this absorbency tier typically relies on waterproof barriers; few mainstream brands (Saalt included) have switched to PFAS-free alternatives at scale. Modal-based period underwear is common and less concerning than polyester-dominant designs, which may carry antimony catalyst residues. Saalt's positioning as a 'natural' or 'comfort-first' brand does not extend to transparent barrier chemistry, which is a competitive weakness versus emerging PFAS-free competitors like Aisle or some Knix lines. Without disclosed treatment, this product sits in the same opacity category as most conventional leak-proof period underwear.
If you buy it
Wash in cold water and air-dry or machine-dry on low; heat can degrade waterproof coatings and theoretically increase migration of barrier chemicals into fabric. Do not bleach or use fabric softener, as these can compromise the water-barrier integrity and potentially increase contact with the coating. Replace after 1-2 years of regular use or if you notice seepage, which often signals coating breakdown. If you are concerned about PFAS exposure, contact Saalt directly requesting written confirmation of non-PFAS waterproof treatment; absence of a clear answer is reason to choose an alternative with published PFAS-free certification.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Saalt has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Saalt Leak Proof Period Underwear High Absorbency - Super Soft Modal Comfort Briefs : Target?
- organic cotton, waterproof backing layer
- A third party reports verifying it as PFAS-free
- Coating degradation and microparticle shedding
2 hazards checked on this product, all on its full breakdown.
- organic cotton blend, water-resistant gusset
- The brand calls it PFAS-free, which we have not verified
- Microplastic shedding from water-resistant barrier
- Organic cotton, wood pulp fiber
- The brand calls it PFAS-free, which we have not verified
- Azo dyes and synthetic dyes
2 hazards checked on this product, all on its full breakdown.
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.