Marmot · Waterproof Outdoor Gear
Marmot Graviton 48L Backpack
water-repellent coating treatment likely contains PFAS; Marmot silent on specifics.
Marmot Graviton uses typical water-repellent coating coatings common in outdoor backpacks, which often contain PFAS-based chemistry. Brand discloses no PFAS information or safer alternatives.
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Material
Nylon/polyester with water-repellent coating (water-repellent coating) treatment
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 Graviton 48L uses nylon and polyester as base fabrics, both synthetic polymers that are chemically stable and do not leach toxic monomers during normal use. The water-repellent coating (water-repellent coating) treatment applied to the exterior is the primary chemical concern. water-repellent coating coatings protect the pack from water absorption but are typically fluorochemical-based, raising PFAS exposure questions. The nylon and polyester themselves are inert in typical backpack use; the finish is what drives chemical risk.
The brand's record and disclosure
Marmot has not publicly committed to PFAS-free water-repellent coating treatments or released detailed chemical disclosures for this model. The brand operates under parent company Amer Sports but does not appear in major apparel transparency initiatives (e.g., Detox Commitment signatories). No recalls or safety warnings specific to Marmot backpacks have been documented. Lack of transparency on water-repellent coating chemistry is typical for outdoor brands but leaves consumers without assurance of safer alternatives.
How it compares in its category
Most outdoor backpacks in this capacity range use fluorochemical water-repellent coating treatments, making the Graviton standard rather than exceptional in chemical profile. Some competitors (e.g., Patagonia) have committed to phasing out long-chain PFAS, but short-chain alternatives (e.g., GenX, PFOA alternatives) still carry unknown long-term health data. Marmot's lack of public positioning places it in the middle of an industry-wide issue rather than as a laggard or leader.
If you buy it
Wash the pack periodically in cool water with mild detergent to remove surface contaminants and reduce potential dermal contact with water-repellent coating residue. Avoid high-heat drying; air dry instead. Do not use fabric softeners or conditioners, which can degrade the water-repellent coating and alter its chemistry. Replace after 5-7 years or when the water-repellent function noticeably fails, as water-repellent coating reapplication products may introduce additional chemical uncertainty.
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.”
Fluorochemical water-repellent coating treatment (PFAS precursor)
Standard water-repellent coating on outdoor nylon packs is fluorochemical-based; Marmot has not disclosed whether this uses legacy PFOA/PFOS or newer alternatives. Direct skin contact is minimal in backpack use, but dermal exposure during washing or if fabric degrades is plausible.
Formaldehyde in textile resins
No reports of formaldehyde-heavy finishes on Marmot backpacks. Modern outdoor nylon typically uses minimal or non-formaldehyde dyes and sizing; unlikely to be a primary hazard with this product.
Antimony in polyester
Antimony trioxide is a rare additive in polyester. No evidence it is used in Marmot's backpack polyester; not a documented concern for this brand or product line.
Azo dyes
Restricted azo dyes (carcinogenic amines) are regulated in apparel manufacturing. No recalls or warnings for Marmot backpacks; standard outdoor gear compliance makes this unlikely.
Microplastics from fiber shedding
Washing nylon/polyester sheds microfibers into wastewater; this is an environmental rather than direct-use hazard. Use a microfiber filter bag or catch during laundering to reduce release.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 42% 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 Outdoor Gear
Patagonia
Refugio Day Pack 26L
recycled nylon with non-fluorinated water-repellent coating treatment
Lower PFAS concern. Patagonia claims non-fluorinated water-repellent coating on this pack.
⚠Waterproof or stain-proof treatment
More waterproof outdoor gear 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.