Do Mountainsmith waterproof outdoor gear storage bags have PFAS?
Mountainsmith waterproof outdoor gear storage bags average 20 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Mountainsmith waterproof outdoor gear storage bags graded as of October 2026, level with the 20 out of 100 median for the 29 other waterproof outdoor gear storage bags brands graded alongside it.
Mountainsmith waterproof outdoor gear storage bags average Bad on our four-band scale. None of them clear our buy threshold. That is above 45% of the waterproof outdoor gear storage bags brands we grade.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Graded and flagged Poor and Bad, we’d swap these
Mountainsmith
Apex 80 Backpack
- Nylon fabric with water-repellent coating
- We found no PFAS statement from the brand
- PFAS, Mountainsmith does not disclose water-repellent coating chemistry. Nylon water-repellent coating…
2 hazards checked on this product. See all of them.
Mountainsmith
Backpack Raincover
- Polyester with water-repellent coating water-repellent coating, unspecified
- We found no PFAS statement from the brand
- Formaldehyde / VOCs, Polyester textiles often use formaldehyde-based resins for wrinkle resistance and shape…
4 hazards checked on this product. See all of them.
Mountainsmith
Divide EVO Daypack
- nylon ripstop with water-repellent coating treatment, specific chemistry unspecified
- We found no PFAS statement from the brand
- PFAS, Mountainsmith does not disclose water-repellent coating chemistry. Nylon ripstop water repellents…
2 hazards checked on this product. See all of them.
Mountainsmith
Dry Kick Waterproof Fanny Pack
- Ripstop nylon with unspecified waterproof coating
- We found no PFAS statement from the brand
- Volatile organic compounds (VOCs) from waterproof coating, Unspecified water-repellent coating may release…
2 hazards checked on this product. See all of them.
Mountainsmith
Epic Lumbar Pack
- Nylon with water-repellent coating water-repellent coating
- We found no PFAS statement from the brand
- water-repellent coating degradation and microparticle shedding, As the water-repellent finish wears over…
Mountainsmith
Mayhem EVO 30 Backpack
- nylon with water-repellent coating (water-repellent coating) finish
- We found no PFAS statement from the brand
- PFAS, The water-repellent coating finish on this pack is undisclosed; if fluorinated (Teflon-type coating or…
Mountainsmith
Zerk 40 Backpack
- Nylon pack fabric with water-repellent coating
- We found no PFAS statement from the brand
- water-repellent coating (water-repellent coating) coating composition, water-repellent coating finish is…
Mountainsmith
Backpack Rain Cover
- synthetic fabric with water-repellent coating water-repellent coating, composition unspecified
- We found no PFAS statement from the brand
- water-repellent coating degradation and particle shedding, Rain covers experience mechanical wear and UV…
2 hazards checked on this product. See all of them.
Better waterproof outdoor gear storage bags from other brands
Graded higher than the Mountainsmith average of 20.
REI Co-op
Trailgate Gear Bin Green 140 L
- Polypropylene storage bin, no water-resistant coating mentioned
- UV degradation and additive leaching
3 hazards checked on this product. See all of them.
Marmot
Tool Box
- Nylon, polyester, cotton blend; details unspecified
- Volatile organic compounds (VOCs) from polyester and nylon manufacturing
5 hazards checked on this product. See all of them.
Patagonia
Disperser Roll Top Pack 40L
- 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. See all of them.
The same question, asked of the other waterproof outdoor gear storage bags brands
Best average grade first. Mountainsmith averages 20.
See every Mountainsmith product we grade on the Mountainsmith brand page, or the full waterproof outdoor gear storage bags ranking.