BOOST Boxer Period Underwear
Lower concern absorbent apparel; no PFAS signals detected, brand silent on it.
Lunapads BOOST uses organic cotton and nylon without disclosed water-repellent or stain-resistant finishes typical of PFAS use. No public lab testing or brand PFAS claims available; materials suggest lower concern, but verification would strengthen confidence.
We flunk more products than we pass. This one earned its grade. How we grade
Material
organic cotton, nylon, gusset absorbent layer
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What BOOST Boxer Period Underwear is made of, ingredients and materials
BOOST Boxer uses organic cotton as the primary material, nylon in the outer layer, and an absorbent gusset layer (material composition not fully detailed publicly). Organic cotton eliminates synthetic pesticide residues common in conventional cotton, which is relevant for prolonged skin contact in period wear. Nylon provides stretch and durability but does not typically leach under normal wear conditions. The absorbent layer chemistry is not disclosed; if it contains superabsorbent polymer (SAP, typically sodium polyacrylate), this is standard in the category and carries no established hazard at skin contact.
What’s concerning
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.
Microplastic shedding from synthetic fibers
The nylon component will shed microfibers in washing, as with all synthetic textiles; this is not specific to this product but inherent to the nylon layer. Shedding is greater in early washes and with hot water.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
Organic cotton certification typically excludes formaldehyde-based finishing resins. No record of formaldehyde use or complaints linked to this product.
Source, ATSDR ↗Azo dyes in textiles
No public disclosure of dye composition. Organic cotton and natural-focused branding suggest lower likelihood of high-risk azo dyes, but specific dye testing results are not available.
Antimony in polyester/nylon
Nylon outer layer may contain residual antimony catalyst from manufacturing, but antimony migration at skin contact is not established as a hazard in apparel and no complaints are on record for this product.
Allergic contact dermatitis from dyes or finishes
No specific allergen complaints or sensitization reports linked to BOOST Boxer. Individual sensitivity to dyes or latex (if present in elastic) is possible but not documented for this brand.
How is this PFAS grade calculated?
The brand's record and disclosure
Lunapads is a Canadian menstrual-care company with a public sustainability focus and organic/natural positioning. The brand does not explicitly address PFAS in product marketing or technical documentation, though the choice of organic cotton and absence of water-repellent marketing suggests lower likelihood of intentional PFAS application. No recalls, safety complaints, or third-party test failures are on public record for this product. Certifications or third-party testing results (e.g., Oeko-Tex, GOTS for the cotton) are not clearly stated in widely available sources.
How it compares in its category
Period underwear in this category typically use organic or conventional cotton, synthetic blends (polyester/nylon), and SAP or cellulose-based absorbent cores. BOOST Boxer's organic cotton base places it toward the lower-chemical end of the market; many mass-market alternatives use conventional cotton (pesticide residues) or add water-repellent coatings that may contain PFAS. The nylon outer layer is standard and does not distinguish this product chemically from peers. No published comparative testing exists for this specific product versus competitors.
If you buy it
Wash in cool to warm water (avoid prolonged heat that could degrade nylon elasticity) and air-dry when possible to extend life. Do not bleach or use fabric softeners, which can reduce absorbency and introduce chemical residues. Replace when elastic loses tension or absorbency visibly declines, typically after 1-2 years of regular use depending on wash frequency. Store in a dry place to prevent mold growth in the absorbent layer between uses.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Lunapads has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to BOOST Boxer Period Underwear?
- 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.