Lululemon · Waterproof Sports & Performance Undergarments
lululemon Always In Motion Boxer 5" 7 Pack
Lower concern. Bare synthetic blend, no known water treatment applied.
Lululemon's boxer briefs are nylon/spandex with no disclosed water-repellent or stain-resistant coatings. No public PFAS disclosures or lab testing on this product.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nylon/spandex blend, no documented coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
clothing is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This product is a nylon and spandex (elastane) blend with no reported water-resistant, stain-resistant, or anti-microbial chemical finishes applied. Nylon is a synthetic polymer that does not leach plasticizers like BPA or phthalates under normal wear and washing conditions. Spandex is similarly stable in the garment context, though it degrades over time with UV exposure and repeated stretching, which is normal aging rather than a safety hazard.
The brand's record and disclosure
Lululemon does not publicly disclose detailed chemical testing or restricted substance lists specific to their basics lines, though the brand has faced periodic scrutiny on labor and sustainability practices rather than material safety. The company has not issued recalls for chemical hazards in their core apparel as of public record. Their silence on PFAS use in athletic wear reflects broader industry practice, but absence of disclosure does not indicate presence of concern chemicals.
How it compares in its category
Uncoated synthetic blends like this are standard and carry lower chemical risk than performance fabrics treated with water-repellent coating (water-repellent coating) coatings, which historically contained PFAS. Compared to cotton-spandex alternatives, nylon offers better durability and moisture-wicking but introduces synthetic microplastics during washing. Lululemon's pricing and brand positioning sit above mass-market basics but below premium heritage brands; chemical practices align with mainstream athletic wear standards.
If you buy it
Wash in cold water to preserve elastane and reduce microfiber shedding. Avoid high heat (dryers above 130F accelerate spandex degradation) and chlorine bleach, which can yellow nylon. Replace after 1-2 years of regular wear as elastic loses function naturally. Air-dry when possible to extend product life and reduce microplastic release to water systems.
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.”
Formaldehyde resins (wrinkle-free or shrink-resist finishing)
No evidence that Lululemon applies formaldehyde-releasing finishes to this basic nylon/spandex blend. Uncoated synthetic underwear does not require such treatment.
Azo dyes and colorant heavy metals
The product uses synthetic dyes on nylon, which is industry standard. Azo dyes are not restricted in athletic wear by most regulations, and no specific recalls exist for this product. Migration to skin is minimal under normal wear.
Antimony in polyester
This product is nylon/spandex, not polyester, so antimony catalysts are not applicable.
Microplastics generation during use and washing
Synthetic fiber garments shed microplastics with each wash, a documented environmental and potential ingestion pathway. This is inherent to all synthetic textiles and not specific to Lululemon; cold-water washing and air-drying minimize shedding.
Elastane (spandex) degradation and breakdown products
Spandex degrades over time and with heat exposure, producing oligomers that could theoretically migrate to skin. This is slow under normal wear and washing; no specific health incidents are recorded for athletic underwear.
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 waterproof sports & performance undergarments 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.