Nike · Waterproof Sports Bags
Nike Brasilia Training Backpack
Backpack likely has water-repellent coating treatment; Nike discloses no PFAS stance.
Nike Brasilia backpacks typically use polyester with water-repellent coating (water-repellent coating) coatings, commonly PFAS-based. Nike has not publicly committed to PFAS-free materials or disclosed treatment details.
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Material
Polyester with water-resistant coating (water-repellent coating treatment unspecified)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
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
The Brasilia is constructed primarily from polyester fabric with an applied water-resistant (water-repellent coating) finish. Polyester itself is chemically stable during normal wear, but the water-repellent coating, almost certainly Teflon-family coating-based given Nike's typical manufacturing, introduces PFAS compounds. These coatings don't leach under normal conditions, but degradation from washing, heat, or abrasion can release them into water or air.
The brand's record and disclosure
Nike has not published a formal PFAS phase-out commitment or chemical disclosure policy for backpacks and gear. The company offers no publicly available information about water-repellent coating treatment specifications in this product line. Nike has faced scrutiny from environmental groups over fluorinated coatings in footwear but has not addressed apparel/gear transparency at the same level as some competitors (e.g., Patagonia's detailed chemical management statements).
How it compares in its category
Most mainstream polyester backpacks with water resistance use PFAS-based water-repellent coating treatments; this is industry standard. Premium alternatives exist (some use PFC-free treatments like wax or silicone blends, or use naturally water-resistant materials), but they command higher prices. The Brasilia sits in the mid-market segment where fluorinated water-repellent coating is the norm; it is not exceptional in hazard profile for its category.
If you buy it
Hand wash in cool water with mild soap; avoid machine washing, which accelerates coating degradation and leaching. Do not dry clean or expose to high heat. Replace when the water-resistant finish visibly breaks down (seams beading less, fabric absorbing water). Store in a cool, dry location. Do not use as a heat-proof or chemical-resistant container.
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.”
Azo dyes in colored polyester
Polyester textiles can be dyed with azo compounds that release aromatic amines under certain conditions (sweat, friction). Nike does not publish dye chemistry for this product. Risk is low with normal wear but may increase if backpack is worn directly against skin during heavy sweating over extended periods.
Antimony catalyst residue in polyester
Polyester is typically synthesized using antimony trioxide as a catalyst. Small residual amounts may remain in the finished fiber. Leaching during normal wear is minimal, but prolonged contact with acidic or hot conditions (e.g., stored in sun) could increase migration slightly. No recalls or incidents reported for this product.
water-repellent coating degradation and inhalation
Teflon-family coating water-repellent coating coatings can release volatile compounds if exposed to friction, heat, or UV over years of use. Inhalation risk is low during normal backpack use but may increase if backpack is used near heat sources or if interior lining degrades visibly.
Formaldehyde resins (if present in finish or dye fixatives)
Nike does not disclose whether formaldehyde-releasing resins are used in dyeing or fabric finishing for this backpack. No recalls or complaints on record. Standard polyester finishing can include such resins, but typical exposure during use is negligible unless backpack is worn intensively against skin in hot, humid conditions.
Flame retardants (if applied)
No evidence that this backpack has been treated with added flame retardants. Polyester is naturally flame-resistant to some extent. Nike does not list flame-retardant chemicals in public product information for this item.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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.
Safer alternatives in Waterproof Sports Bags
Garmin
Carrying Case
Neoprene or polyester case, material unspecified
Unknown material raises concern; no PFAS disclosure from Garmin.
⚠Risky category by default
Patagonia
Guidewater Sling
recycled polyester with water-repellent coating finish
Lower concern; brand committed to PFAS-free water-repellent coating, but verify current batch
⚠Waterproof or stain-proof treatment
More waterproof sports bags 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.