Kelty · Waterproof Outdoor Gear Storage Bags
US Military Backpack Kelty Multi Purpose Waterproof Bag
Unknown waterproof finish; manufacturer refuses PFAS transparency.
This military-grade Kelty backpack pairs nylon and polyester with waterproof coating of unknown composition. Kelty won't disclose PFAS information.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nylon/polyester with waterproof coating, composition unspecified
Lab data
No public lab test
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What US Military Backpack Kelty Waterproof Bag is made of, ingredients and materials
This backpack uses nylon and polyester with an applied waterproof coating whose specific chemistry Kelty does not publicly disclose. Waterproof treatments on textiles are commonly applied as fluorinated compounds (PFAS-based) or, less commonly, wax or other polymer coatings. Without ingredient transparency, the type and persistence of the water-repellent layer cannot be verified. Nylon and polyester themselves are stable synthetics with low leaching risk under normal use, but the coating is the variable element.
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.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Waterproof coating composition (unspecified)
Kelty does not publicly identify the waterproof treatment type. It may contain PFAS (fluorinated polymers), but no independent testing or manufacturer disclosure confirms or denies this. Users cannot assess this risk without additional information from the brand.
Coating degradation and particulate release
As waterproof finishes age and flake from mechanical wear or heat exposure, fine particles may shed into packed contents or onto skin during use. The chemical composition of these shed particles is unknown because the coating itself is undisclosed, creating uncertainty about inhalation or ingestion risk.
What’s reassuring
Azo dyes in polyester component
No specific reports of azo dye issues in Kelty multipurpose backpacks. Polyester fabric may use azo dyes in industrial production, but this is standard industry practice and requires direct contact with skin to pose any risk; a backpack worn over clothing is a low-exposure scenario.
Flame retardants
No evidence that Kelty applies flame retardant chemicals to outdoor backpack nylon/polyester. Military-spec backpacks are not typically treated with brominated or phosphorus flame retardants unless specifically marketed as fire-resistant, which this product is not.
Source, EPA ↗Heavy metals
No recalls or testing reports indicate lead, cadmium, or other heavy metals in Kelty backpack components. Synthetic fabric dyes and metal zippers/buckles in outdoor gear are typically low-heavy-metal designs, though certification is absent.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Kelty is a US-based outdoor gear manufacturer owned by the Wolverine World Wide group; they do not currently publish PFAS content or waterproof treatment specifications for their products. The brand has no publicly documented recalls or chemical safety controversies specific to this backpack line. Kelty offers no third-party certifications (such as OEKO-TEX or Bluesign) on standard multipurpose bags, which limits independent verification of finish hazards.
How it compares in its category
Military-style waterproof backpacks in this price and use tier typically employ water-repellent coating (water-repellent coating) finishes; nylon and polyester bodies are industry standard. Competitors vary widely in coating disclosure, some brands now specify wax-based or PFOA-free treatments, while others remain silent like Kelty. Without manufacturer transparency, this bag occupies a middle position where chemical hazard cannot be ruled in or out relative to alternatives.
If you buy it
Avoid machine washing with hot water, which can degrade waterproof coatings and potentially mobilize additives; hand-wash in cool water if needed. Do not dry clean or expose to prolonged heat (e.g., direct sunlight for weeks), as thermochemical breakdown of the coating accelerates over time. Inspect the interior and exterior for peeling, flaking, or discoloration after 2-3 years of heavy use; this signals coating degradation and may warrant replacement. Store in a cool, dry place away from solvent vapors or chlorinated environments, which can weaken synthetic finishes.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kelty has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to US Military Backpack Kelty Multi Purpose Waterproof Bag?
- Polypropylene storage bin, no water-resistant coating mentioned
- UV degradation and additive leaching
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Nylon, polyester, cotton blend; details unspecified
- Volatile organic compounds (VOCs) from polyester and nylon manufacturing
5 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Recycled polyester with water-repellent coating (water-repellent coating) finish
- The brand calls it PFAS-free, which we have not verified
- PFAS
4 hazards checked on this product, all on its full breakdown.
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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.