Black Diamond · Waterproof Outdoor Gear Storage Bags
Black Diamond Stone Duffel
Likely waterproofed; coating composition unclear, skip or contact brand.
Black Diamond duffels use durable water-resistant fabrics typical of outdoor gear. No public PFAS disclosures available; coating chemistry undisclosed. Contact brand for specific water-repellent coating treatment details.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Durable fabric with water-resistant 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 Black Diamond Stone Duffel uses a durable synthetic fabric base (likely nylon or polyester blend) with a water-resistant coating applied to the exterior. Water-repellent treatments on outdoor gear typically rely on fluorochemical compounds (PFAS-based) or newer polyurethane/silicone alternatives; Black Diamond has not publicly disclosed which chemistry they use on this model. The coating protects the bag from moisture and extends its functional life, but its specific formulation directly determines leaching risk and environmental persistence.
The brand's record and disclosure
Black Diamond (owned by Clarus Corporation) manufactures climbing and outdoor gear but maintains minimal public transparency on PFAS use or water-resistance chemistry. The brand has not published a chemical disclosure policy or PFAS phase-out commitment comparable to competitors like Arc'teryx or Patagonia. No recalls or contamination incidents are on record for this specific duffel model. Direct contact with the brand is the only reliable path to confirm coating composition.
How it compares in its category
Outdoor duffle bags in this price and performance tier typically use either legacy PFOA-based coatings, newer PFAS alternatives (GenX, FTOH), or non-fluorinated polyurethane systems. Black Diamond's silence on this choice is less transparent than brands that explicitly state PFAS-free or PFAS-reduced certifications (Bluesign, GOTS, or OEKO-TEX). The durability claims and rubberized construction suggest a robust coating, but durability does not imply safety or environmental responsibility.
If you buy it
Inspect the bag monthly for coating flaking, creasing, or whitening, which indicate breakdown and potential microparticle release. Avoid storing the bag in hot vehicles or direct sunlight for extended periods, as heat can accelerate coating degradation and leaching. Wash by hand with cool water and mild soap; do not machine wash or dry-clean, which can damage the coating. Email Black Diamond's customer service requesting the OECA (chemical generic name) or CAS number of the water-resistant coating before purchase if PFAS concerns are significant to your decision.
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-resistant coating degradation and microparticle shedding
Durable outdoor bags experience repeated flexing, creasing, and UV exposure that degrade polymer coatings over 2-5 years. No testing data is publicly available for this specific model, but microflaking from compromised coatings is a known failure mode in durable fabric products, particularly if the coating contains rigid PFAS-based formulations.
Coating leaching into contents (food, water, textiles)
If the water-resistant treatment uses fluorochemical compounds, prolonged contact with damp contents or food items may transfer trace coating residues. Risk is lower for dry goods and higher for water containers or food stored directly against the interior. Brand silence on coating chemistry prevents a more precise assessment.
Synthetic fabric off-gassing and dye stability
No recalls or complaints are on record for VOC off-gassing or azo-dye migration from Black Diamond Stone Duffels. Polyester and nylon used in outdoor gear are typically of acceptable quality, but bag interiors are not routinely tested for formaldehyde resins or banned azo dyes. Risk is minimal but non-zero if the bag is used to store food or delicate textiles immediately after purchase.
Adhesive and seam-sealing chemistry
Taped or thermally sealed seams may use polyurethane or silicone adhesives; none of these are documented as problematic for Black Diamond products. No specific adhesive composition is disclosed by the brand for this model.
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.
More waterproof outdoor gear storage bags 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.