Helly Hansen · Waterproof Outdoor Bags & Luggage
Helly Hansen Oslo Max Backpack
Outdoor backpack with likely water-repellent coating treatment; PFAS status unclear.
Helly Hansen Oslo Max uses durable ballistic materials with water-resistant coating typical of outdoor packs. Brand discloses no PFAS information; water-repellent coating treatments often contain PFAS but not confirmed here.
The safe swap
Garmin
Garmin Carry Case
85/100 safety
Same rubric that flunked this product. The swap earned its B.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Ballistic polyester/nylon exterior with water-repellent coating
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
other 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 Oslo Max uses ballistic polyester and nylon exterior fabrics, both synthetic polymers chosen for durability and water resistance. These are coated with a water-repellent coating (water-repellent coating) treatment to shed moisture; the chemical composition of Helly Hansen's specific water-repellent coating formulation is not publicly disclosed. Ballistic polyester and nylon themselves do not off-gas significant volatile organic compounds (VOCs) under normal use conditions, but the water-repellent coating application introduces uncertainty about fluorinated or other chemical additives.
The brand's record and disclosure
Helly Hansen has not published a transparent public statement on PFAS use in water-repellent coating coatings across their product line, despite being a major outdoor apparel and gear manufacturer. The company maintains general sustainability messaging but does not offer third-party PFAS testing results or commitments to phase out fluorinated water repellents. This silence is notable given the outdoor industry's growing PFAS transparency among competitors; the lack of clarity warrants caution.
How it compares in its category
Most mainstream outdoor backpacks use water-repellent coating coatings, creating a widespread PFAS exposure risk across the category. Some competitors (e.g., Patagonia, Arc'teryx) have begun disclosing or restricting PFAS in certain product lines, while others remain opaque. The Oslo Max sits in the mid-to-premium segment and is known for durability, but its water-repellent coating treatment transparency lags leaders in chemical disclosure.
If you buy it
Avoid machine washing in hot water, which can degrade water-repellent coating coatings and potentially mobilize residual chemicals. Hand wash with mild soap and cool water when needed, then air dry flat. Reapply commercial water-repellent coating treatments as water beading diminishes (typically after 1-2 years of heavy use) rather than disposing of the bag. Store in a dry, well-ventilated space to prevent mold and avoid prolonged heat exposure (e.g., direct sunlight storage or hot car interiors).
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.”
PFAS in water-repellent coating
Ballistic polyester backpacks commonly use fluorinated water-repellent coating treatments containing legacy PFAS (PFOA, PFOS) or newer alternatives (GenX, PFBS). Helly Hansen has not disclosed which, if any, are in the Oslo Max, making exposure assessment impossible.
Microplastic shedding from synthetic fabrics
Ballistic polyester and nylon both release microfibers during wear and washing. This is a known environmental hazard rather than direct health hazard, but washing shedding can reach waterways; minimizing machine washing extends fiber retention.
Coating degradation over time
water-repellent coating coatings on synthetic backpacks degrade within 1-3 years of regular use. As coatings break down, water repellency fails and some users report handling worn backpacks more frequently, indirectly increasing contact with aged coating residues.
Volatile organic compounds (VOCs) from adhesives and finishes
Off-gassing from ballistic polyester and nylon backpacks is minimal compared to other textiles. No specific VOC complaints or test data exist for the Oslo Max or typical Helly Hansen construction.
Heavy metal dyes in colored fabrics
Modern ballistic polyester fabrics rarely use heavy metal-laden dyes, and Helly Hansen backpacks have no documented azo dye or heavy metal contamination. Industry practice has moved away from these, though third-party verification is absent.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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 Bags & Luggage
Garmin
Carry Case
Neoprene or polyester with nylon hardware
Lower concern protective case, no known PFAS risk signals.
⚠Brand says nothing about PFAS
Keen
Hybrid Transport Backpack Tan Recycled Rice Paper Plastic Daypack
Recycled rice paper, plastic composite, no evident water-resistant coating
Lower concern. Plain materials, no apparent water-repellent coating treatment.
⚠Brand says nothing about PFAS
More waterproof outdoor 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.