Granite Gear · Waterproof Outdoor Gear Bags
Granite Gear Women's Perimeter 35 Backpack
Unknown water-repellent coating risk; no PFAS disclosure from brand.
Granite Gear does not publicly disclose PFAS or water-repellent coating treatment details. Standard outdoor backpack likely uses water-repellent finish, often PFAS-based, but no confirmation available. Consider contacting brand directly for coating specifics.
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Material
Nylon with water-repellent coating water-repellent 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 Perimeter 35 uses nylon as its primary fabric, a durable synthetic polymer that does not inherently pose chemical hazards. However, it includes a water-repellent coating (water-repellent coating) finish applied to the fabric surface. water-repellent coating treatments historically relied on PFAS compounds (perfluorinated chemicals) to achieve water shedding; modern alternatives exist but are not universally adopted. Granite Gear has not publicly disclosed which water-repellent coating chemistry they use on this model, leaving the specific risk profile unclear.
The brand's record and disclosure
Granite Gear is a smaller outdoor gear manufacturer with minimal public safety documentation or third-party certifications on their website. The brand does not appear to have published statements on PFAS use, heavy metals, or chemical testing for their textile products. No recalls or regulatory actions specific to Granite Gear backpacks have been established in public records. This silence on chemical composition is a red flag compared to larger competitors who increasingly disclose water-repellent coating chemistry and commit to PFAS-free alternatives.
How it compares in its category
Outdoor backpacks universally require water-repellent treatment; the Perimeter 35 is typical in this respect. Some premium competitors (e.g., Patagonia, Arc'teryx) now explicitly state use of PFAS-free water-repellent coating chemistries like polyether or wax-based treatments. Mid-range brands like Granite Gear often leave water-repellent coating sources unspecified, making direct comparison difficult. For nylon apparel without water-repellent coating, this backpack falls into a standard risk category, but the coating uncertainty elevates concern relative to transparent competitors.
If you buy it
Wash infrequently and by hand in cool water to minimize water-repellent coating leaching and fabric wear. Avoid machine drying or heat exposure, which can degrade nylon and potentially release volatile compounds from coatings. Do not expose the pack to prolonged direct sunlight, as UV degrades nylon over time and may alter coating chemistry. If the water-repellent coating fails visibly (water no longer beads), consider retiring the pack rather than retreating it with unknown chemistry, or contact Granite Gear directly to request water-repellent coating composition before any reapplication.
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 (unconfirmed)
Nylon backpacks commonly use PFAS-based water-repellent coating finishes. Granite Gear has not disclosed which chemistry they employ, so PFAS presence cannot be ruled out. Leaching risk is minimal during normal use but increases with washing and body contact with perspiration.
Formaldehyde in textile resins
No recalls or reports of formaldehyde-treated nylon in Granite Gear packs. Nylon fiber itself does not require formaldehyde-based resins, though dyes or finishing agents might contain trace formaldehyde. No evidence of this in public records for this brand or model.
Azo dyes or heavy metals in colorants
No known contamination reports for Granite Gear backpacks. Nylon dyes used by reputable outdoor suppliers are generally compliant with OEKO-TEX or similar standards, but Granite Gear does not advertise certification. Risk is low for typical color fastness but unverified.
Polyester antimony (if any polyester present)
Product is described as nylon; if any polyester trim or webbing is present, antimony catalyst residues are theoretically possible but not documented for this model. Nylon dominates the pack structure, so this is a minor concern.
water-repellent coating degradation and reapplication risk
Over 2-5 years, water-repellent coating coatings on nylon degrade naturally. Consumers often reapply commercial water-repellent coating sprays (many still PFAS-based) without knowing composition. Granite Gear's silence on this lifecycle leaves users vulnerable to inadvertently applying high-PFAS products during maintenance.
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 Waterproof Outdoor Gear Bags
Marmot
Tool Box
Nylon, polyester, cotton blend; details unspecified
Toolbox, not garment. Check product specs for water-repellent coating.
⚠Risky category by default
More waterproof outdoor gear 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.