Peak Design · Waterproof Outdoor Gear
Peak Design Outdoor Backpack 45L Eclipse
Outdoor backpack likely uses water-repellent coating; Peak Design silent on PFAS
Peak Design does not disclose PFAS use or avoidance. Outdoor backpacks typically receive water-repellent coating treatment, which historically often contained PFAS, though some brands now use alternatives. No third-party verification available.
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Material
Nylon/polyester with water-repellent coating 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
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 Peak Design Outdoor Backpack 45L uses a nylon and polyester blend with a water-repellent coating (water-repellent coating) coating applied to the exterior. The water-repellent coating finish is the chemical wild card: traditional fluorocarbon-based water-repellent coating coatings contain long-chain PFAS, while newer formulations may use PFAS-free or short-chain alternatives. Peak Design has not publicly disclosed which water-repellent coating chemistry they use on this model, leaving the PFAS status unknown. The base fabrics (nylon and polyester) themselves carry lower inherent chemical risk compared to coatings.
The brand's record and disclosure
Peak Design maintains a reputation for quality outdoor gear but has not published a formal PFAS policy or supply chain transparency statement available in standard consumer channels. The company does not appear in major PFAS commitment databases (such as the Safer Chemicals Retail Pledge or similar industry initiatives). This silence is not unusual for smaller outdoor brands, but it means consumers cannot independently verify whether the water-repellent coating on this specific backpack meets emerging PFAS-free standards. No recalls or safety violations are on record for this product line.
How it compares in its category
Most outdoor backpacks in this price range and performance tier use water-repellent coating coatings of uncertain chemistry. Brands like Patagonia and REI Co-op have begun public commitments to PFAS reduction; Peak Design has not made equivalent statements. The nylon/polyester base material is industry standard and poses minimal direct chemical risk. The key differentiator among outdoor packs is coating transparency, where this product lacks competitive advantage over disclosure-leading brands.
If you buy it
Contact Peak Design directly before purchase to ask which water-repellent coating chemistry is used on the Eclipse model (fluorocarbon, polyurethane, paraffin, or other). Avoid machine washing or dry cleaning, which can release coating particles and degrade the fabric; hand rinse with cool water and mild soap. Store in a dry place to prevent mold growth inside seams and padding. If the coating delaminates or noticeably flakes, consider professional re-treatment or replacement rather than continued use of a failing waterproof layer.
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
The water-repellent coating water-resistant finish likely contains PFAS based on industry standard practice, but Peak Design has not disclosed the specific chemistry. Long-chain PFAS bioaccumulate in human tissue and environment; newer short-chain alternatives have less established safety data but lower persistence.
Formaldehyde resins in fabric finishing
Nylon and polyester fabrics may be treated with formaldehyde-based resins during dyeing or finishing to improve wrinkle resistance or colorfastness. No specific reports exist for Peak Design packs, but the risk is typical across outdoor textiles. Off-gassing is minimal after initial production washout.
Azo dyes or heavy metal dyes
The Eclipse model's dark color (eclipse = black/charcoal) may use azo dyes or carbon black pigments. Reputable outdoor brands typically use regulated dyes, but Peak Design does not publish dye chemistry. Risk is low if fabrics are pre-washed before first use.
Coating degradation and microparticle shedding
As water-repellent coating coatings age or are abraded, they can shed microparticles into water or soil. This is a use-phase concern rather than a manufacturing hazard, affecting both the user and downstream water systems if the pack is washed or disposed of improperly.
Flame retardants in padding or lining
If the backpack includes foam padding or synthetic lining, it may contain flame retardants to meet textile safety standards in some markets. No public reports exist for this product. Risk is minimal during normal carry use but increases if padding is compressed or handled roughly over years of use.
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
Patagonia
Refugio Day Pack 26L
recycled nylon with non-fluorinated water-repellent coating treatment
Lower PFAS concern. Patagonia claims non-fluorinated water-repellent coating on this pack.
⚠Waterproof or stain-proof treatment
More waterproof outdoor gear 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.