Stren · Fishing Line
Stren Original
Lower PFAS concern for a fishing line product; no coating or treatment typical of PFAS carriers.
Stren Original is a monofilament nylon fishing line without the water-resistant coatings, nonstick finishes, or stain treatments that typically introduce PFAS. The brand makes no PFAS claims, but the product category itself does not commonly require or use fluorochemicals.
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Monofilament nylon fishing line
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
other is a category where PFAS exposure is more common.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Stren Original is extruded monofilament nylon (typically nylon 6 or nylon 6.6), a single-strand polymer with no added coatings, dyes, or treatments that would introduce leachable additives. Monofilament nylon is chemically stable in water and does not degrade into microplastics under typical fishing use conditions, though mechanical abrasion and UV exposure over extended outdoor storage can cause surface degradation. The material itself poses no ingestion risk during normal handling, and nylon monofilament does not off-gas volatile compounds under standard freshwater or saltwater conditions.
The brand's record and disclosure
Stren (owned by Pure Fishing, a subsidiary of Newell Brands) does not publish detailed material safety data sheets or third-party certifications for monofilament line products, which is typical for this category. No recalls or safety incidents specific to Stren Original monofilament have been established in public records. The brand maintains silent stance on PFAS, consistent with industry practice for uncoated nylon fishing lines, where PFAS use is not standard.
How it compares in its category
Stren Original occupies the mainstream-budget segment of monofilament lines. It performs comparably to other uncoated nylon monofilaments (Berkley Trilene, Maxima) in terms of chemical safety profile, as the hazard tier for this material class is uniformly low. Braided or fluorocarbon alternatives carry different (generally lower) chemical concerns but higher cost; monofilament remains the simplest, least-processed option.
If you buy it
Store spools in a cool, dry place away from direct sunlight to minimize UV-induced brittleness and surface cracking over time. Replace line annually or after heavy use, as degraded monofilament sheds small polymer fragments into water bodies; older, visibly degraded line should not be disposed of in waterways. Handle and discard spent line responsibly as plastic waste. No special handling precautions are needed during normal use.
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.”
Microplastic shedding from degradation
Monofilament nylon can degrade and fragment under UV exposure and mechanical stress during storage and use. Degraded or worn line sheds small plastic particles into aquatic environments; this is an environmental hazard rather than direct consumer risk.
UV-induced brittleness and material failure
Uncoated nylon monofilament becomes brittle and prone to cracking with prolonged UV exposure during outdoor storage. Stren Original users commonly report line degradation after one season if stored in sunlight, increasing failure risk and requiring more frequent replacement.
Dye additives in colored variants
Stren Original includes colored line options (yellow, green, red); no public data exist on colorant identity or leaching potential. Dyes used in fishing line are generally approved for food-contact plastics in most jurisdictions, but formulations are proprietary and not disclosed.
Nylon monomer residuals (caprolactam)
Extruded nylon monofilament can contain trace caprolactam monomer from incomplete polymerization. At the minute concentrations typical in finished monofilament and under non-heating conditions, this poses no established consumer risk; no recalls or incidents tied to this mechanism exist for fishing line.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 75% 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 fishing line 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.