Mountainsmith · Portable Outdoor Gear Bags
Mountainsmith Apex 80 Backpack
High-end backpack likely uses water-repellent coating treatment; PFAS risk unclear, no brand disclosure.
Mountainsmith does not publicly disclose PFAS in the Apex 80. Premium hiking packs typically use water-repellent coating coatings that may contain PFAS, but no lab data or brand statement available for this model.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nylon fabric 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
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 Apex 80 uses nylon fabric, a synthetic polymer derived from petroleum, treated with a water-repellent coating (water-repellent coating) coating to shed moisture. Nylon itself is chemically stable and does not leach under normal use conditions. The water-repellent coating finish is the material concern: many water-repellent coating treatments historically relied on PFOA or other fluorochemicals to function, though reformulated alternatives now exist. Without Mountainsmith's disclosure of their specific water-repellent coating chemistry, the true composition remains opaque.
The brand's record and disclosure
Mountainsmith has not published a public statement on PFAS use, chemical transparency, or third-party certifications (such as OEKO-TEX or bluesign) in their product line. The company does not appear in major chemical disclosure databases or sustainability reports. This silence does not confirm PFAS use, but it signals a lack of proactive transparency typical of outdoor brands facing consumer scrutiny on fluorochemical content.
How it compares in its category
Mid-to-high-end nylon backpacks occupy a crowded market; many competitors (e.g., Osprey, Patagonia, Gregory) now specify fluorine-free or low-impact water-repellent coating systems in their product descriptions. Mountainsmith's Apex line does not; this gap places it behind category leaders on chemical disclosure, though the absence of a statement does not guarantee conventional PFAS treatment. Price point and durability are competitive; chemical transparency is not.
If you buy it
Wash the pack in cool water with mild soap; avoid dry cleaning, which can concentrate residues. Store in a dry location to minimize mold growth and the need for re-treatment. Nylon is durable but will degrade slowly over years of UV exposure and heavy abrasion; replacement is typically warranted after 5-10 years of heavy use. If water repellency fades, commercial nylon water-repellent coating refresh kits are available; test on a hidden seam first to avoid stiffening.
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.”
water-repellent coating fluorochemical residue (PFAS-related but assessed separately)
Mountainsmith does not disclose water-repellent coating chemistry. Nylon water-repellent coating coatings commonly use fluorinated compounds; reformulated non-fluorine options are commercially available but not confirmed in this product.
Azo dyes in nylon or trim
No recalls or reports of azo dye contamination in Mountainsmith packs. Nylon fabric typically dyed with regulated colorants, but third-party testing is not publicly available.
Formaldehyde or formaldehyde-releasing resins
Nylon itself does not require formaldehyde-based finishes; no evidence of these substances in outdoor nylon packs of this type.
Heavy metals in stitching or hardware
Zippers and grommets on outdoor packs may contain trace metals, but mainstream brands typically use zinc or aluminum alloys that meet consumer safety limits. No specific safety alerts on record for Mountainsmith hardware.
Microfiber shedding during washing
Nylon fabric sheds microfibers when washed, especially with synthetic water-repellent coating coatings. This is a general concern for all synthetic textiles; use a wash bag or rinse cycle filter to reduce environmental discharge.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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 Portable Outdoor Gear Bags
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Polypropylene storage bin, no water-resistant coating mentioned
Lower PFAS concern for bare plastic storage container.
⚠Risky category by default
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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.