REI Co-op · Waterproof Sports Bags
REI Co-op Men's Ruckpack 40 Pack
Skip until REI discloses water-repellent coating treatment composition details.
Backpack uses typical nylon with water-resistant coating; REI provides no PFAS disclosure. water-repellent coating treatments commonly contain fluorochemicals, but brand transparency is absent.
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Material
Nylon with water-repellent coating water-repellent coating 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 Ruckpack 40 is constructed from nylon fabric with a water-repellent coating (water-repellent coating) treatment applied to the exterior. Nylon itself is a synthetic polymer with a well-established safety profile in apparel and gear applications. The water-repellent coating is the variable: legacy water-repellent treatments often used PFAS-based compounds (like Teflon-type coating or C8/C6 perfluorinated chemicals), though modern formulations increasingly use PFAS-free alternatives. Without REI's published specification, the actual chemistry of this pack's water-repellent coating remains opaque.
The brand's record and disclosure
REI Co-op has not publicly committed to PFAS-free water-repellent coating treatments across its gear lines, nor has it disclosed the specific water-repellent chemistry used in the Ruckpack 40. The brand markets sustainability but lacks transparency on fluorinated compound use comparable to competitors like Patagonia or Arc'teryx, which have published PFAS phase-out timelines. REI's silence suggests either use of conventional PFAS-based treatments or a lack of supply-chain visibility into component sourcing.
How it compares in its category
Mid-range hiking packs typically use water-repellent coating treatments; REI's offering is structurally comparable to competitors but lags in chemical transparency. Brands like Osprey and Gregory have begun labeling PFAS-free or low-PFAS options for backpacks, making the Ruckpack 40's opaque water-repellent coating a relative weakness in the category. For a pack at this price point, the lack of disclosed material standards is notable given industry movement toward transparency.
If you buy it
Standard nylon pack care applies: avoid machine washing (hand rinse with mild soap), air-dry fully before storage, and inspect seams and water-repellent coating annually for wear. Do not apply heat or tumble-dry. If the water-repellent coating degrades noticeably (water no longer beads on fabric), you can reapply commercial PFAS-free water repellents, giving you control over future chemical exposure. Store in a cool, dry place away from direct sunlight to slow material degradation.
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 PFAS content
REI has not disclosed whether the Ruckpack 40 uses legacy PFAS-based water repellents or newer fluorine-free alternatives. Historical nylon gear commonly used Teflon-type coating or C6/C8 compounds; without specification, PFAS presence cannot be ruled out.
Nylon fiber degradation and microfiber shedding
Extended use, washing, and abrasion cause nylon packs to shed microfibers. While not unique to REI, the Ruckpack's durability design (intended for repeated use and washing) means moderate microfiber release is plausible over years of use.
Dyes and finishes in synthetic textiles
REI Co-op does not publish data on azo dye restrictions or heavy-metal testing for its nylon packs. No recalls or safety alerts specific to the Ruckpack 40 colorants have been reported; industry standard regulation in US/EU markets makes acute hazard unlikely.
Formaldehyde or formaldehyde-releasing finishes
Nylon packs do not typically receive formaldehyde-based wrinkle-resist treatments common in cotton apparel. No established reports of formaldehyde in REI Co-op pack materials; this hazard class is low-relevance for this product type.
Coating adhesion and leaching from water-repellent coating during wet use
If the water-repellent coating includes volatile or semi-volatile fluorinated compounds, heavy rain exposure or warm-water hand washing could theoretically mobilize trace compounds into rinse water. REI's lack of ingredient transparency prevents assessment of leaching risk.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 42% 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 Sports Bags
Garmin
Carrying Case
Neoprene or polyester case, material unspecified
Unknown material raises concern; no PFAS disclosure from Garmin.
⚠Risky category by default
Patagonia
Guidewater Sling
recycled polyester with water-repellent coating finish
Lower concern; brand committed to PFAS-free water-repellent coating, but verify current batch
⚠Waterproof or stain-proof treatment
More waterproof sports 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.