Marmot · Waterproof Bags & Luggage
Marmot Weekender Backpack
Backpack with unknown water-repellent coating treatment; PFAS risk unclear without material disclosure.
Marmot Weekender uses durable nylon with water-resistant treatment, but the brand does not disclose water-repellent coating chemistry. Outdoor gear typically uses fluorocarbon treatments; request material specs before purchasing.
The better-graded swap
Granite Gear
Granite Gear ToughSack Assorted Colors
85/100 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
Nylon with water-repellent coating
Lab data
No public lab test
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What Marmot Weekender Backpack is made of, ingredients and materials
The Weekender uses nylon fabric with a water-repellent coating (water-repellent coating) coating, a standard construction for outdoor packs. Nylon itself is a stable synthetic polymer with no established toxicity concern during normal use. The water-repellent coating finish is the material wild card, this is typically applied post-manufacture to repel water, and historically many brands used PFOA-based or other PFAS chemistry, though alternatives exist. Without Marmot's explicit material disclosure, the specific water-repellent coating chemistry remains opaque.
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.
PFAS
Water-repellent coating finishes on outdoor nylon textiles commonly contain or contained PFAS (PFOA, PFOS, or newer alternatives). Marmot has not disclosed the specific chemistry for this product, so PFAS presence cannot be ruled out. Direct skin contact during normal use is low-risk; inhalation or ingestion risk is negligible.
Source, ATSDR ↗Coating degradation and microparticle shedding
Water-repellent coating coatings wear over time with washing and use. As the coating breaks down, nylon fibers themselves may shed as microfibers, though this is not a known acute hazard. Shedding intensity depends on wash frequency and mechanical abrasion; the Weekender's durability rating suggests moderate resistance to this.
What’s reassuring
Azo dyes and textile colorants
No specific reports of hazardous azo dyes or heavy metal dyes in Marmot Weekender fabrics. Nylon dyeing can use azo chemistry, but restricted azo dyes are regulated under EU standards and largely avoided in US-market products. No regulatory action against this brand on dye hazards is on record.
Formaldehyde / VOCs
Nylon does not typically require formaldehyde-based wrinkle-resistance or water-repellent resins as do cotton or cotton-blend textiles. The water-repellent coating finish is the only significant chemical post-treatment, and this is not typically formaldehyde-based. No known formaldehyde hazard for this product class.
Source, ATSDR ↗Heavy metals
Backpack hardware (zippers, buckles, stitching) may contain zinc, nickel, or other metals. No specific recalls or safety warnings for Marmot hardware are on record. Nickel sensitivity is possible in individuals with contact dermatitis, but this is a rare subset and not a product-specific risk.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Marmot (owned by Amer Sports) does not publicly disclose water-repellent coating chemistry or maintain a published PFAS-free commitment for this product line. The brand has not issued recalls or public warnings specific to this backpack, and no regulatory violations are on record. However, silence on water-repellent coating sourcing is common across mid-market outdoor brands and does not indicate safety assurance. Contacting Marmot directly for material specifications would be a prudent step if PFAS avoidance is a priority.
How it compares in its category
Most nylon daypack and weekend-bag competitors (North Face, Osprey, REI house brands) similarly use nylon with undisclosed or PFAS-based water-repellent coating treatments. A small number of brands now advertise PFAS-free water-repellent coating or avoid water-repellent finishes altogether, making those explicit choices stand out. The Weekender is typical for its price point and market segment, meaning PFAS and coating opacity are industry-wide rather than brand-specific shortcomings.
If you buy it
Handle normally; nylon does not off-gas under standard conditions, and water repellency does not increase hazard during ordinary use. Avoid deliberate heat (do not machine dry or iron the fabric), as elevated temperature could theoretically affect coating stability, though practical risk during backpacking is minimal. Wash infrequently with cool water and mild soap to preserve the water-repellent coating layer; harsh chemicals may degrade it faster. If PFAS exposure is a health priority, request material safety data from Marmot before purchase, or opt for brands with explicit PFAS-free or PFAS-safe certifications.
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
- Marmot 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 Marmot Weekender Backpack?
- Cordura nylon fabric
- We found no PFAS statement from the brand
- Heavy metals
- Polyester webbing and nylon
- Azo dyes in polyester webbing
4 hazards checked on this product, all on its full breakdown.
- Polypropylene shell, polyurethane foam, stainless steel hardware
- Polyurethane foam degradation and off-gassing
More waterproof bags & luggage 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.