Stren · Fishing Line
Stren Original Monofilament Line 330yd 12 lb
Lower-concern choice; standard nylon monofilament fishing line has no known PFAS risk profile.
Stren Original is standard nylon monofilament fishing line with no identified Teflon-family coating coatings, water-repellent coating treatments, or nonstick additives typically associated with PFAS. The brand makes no PFAS claims.
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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.
No PFAS disclosure
No public statement about PFAS in this product.
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 nylon monofilament, a single continuous strand of polyamide polymer. Monofilament nylon is chemically inert in water and does not leach additives into aquatic environments under normal fishing conditions. This material class has been in widespread use for over 50 years with no documented health or environmental hazard profile tied to the polymer itself.
The brand's record and disclosure
Stren (owned by Newell Brands) does not publish detailed composition or safety data sheets for consumer fishing line products, which is typical for this category. No product recalls, manufacturing controversies, or third-party safety certifications are on record for Stren Original monofilament. The brand maintains a standard market position without distinguishing claims around material safety or sustainability.
How it compares in its category
Monofilament nylon lines like Stren Original represent the baseline fishing line category and carry no known hazards distinct from fluorocarbon or braided alternatives. Monofilament is slightly more prone to UV degradation and strength loss over time compared to newer materials, but this is a performance issue, not a safety issue. Stren Original is competitively positioned as a budget-friendly, reliable mainstream option.
If you buy it
Store spools in a cool, dry place away from direct sunlight to slow UV degradation and maintain strength over seasons. Replace line annually or after visible discoloration, brittleness, or fraying at guides. Monofilament absorbs water slightly over time, which can reduce breaking strength by 5-10 percent; this does not pose safety risk to the user but may affect catch reliability. Dispose of old line in trash or municipal waste; do not discard in water or wildlife areas.
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.”
UV degradation and material brittleness
Nylon monofilament degrades in sunlight over months to years. This reduces line strength and increases breakage risk during use, not a chemical hazard to the angler but a performance failure that could lead to lost catch or tackle.
Water absorption and strength loss
Nylon absorbs moisture from water and air, causing gradual strength loss (typically 5-10 percent) over a season. This is a known property of the material, not a toxicological hazard, but affects reliability.
Aquatic persistence (environmental, not consumer safety)
Monofilament nylon does not biodegrade in aquatic environments and persists for decades if discarded in water. This is an environmental concern for wildlife entanglement, not a direct chemical hazard to the user.
Additives in polymer formulation
Standard nylon monofilament typically contains UV absorbers and slip agents; Stren does not disclose specific additives. No documented leaching or toxicity issues are on record for monofilament fishing line in normal use.
Heavy metals or dyes
Monofilament is typically colorless or dyed with standard azo or reactive dyes during extrusion. No lead, cadmium, or other restricted metals are established as present in commercial monofilament fishing line.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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 Fishing Line
Stren
Original
Monofilament nylon fishing line
Lower PFAS concern for a fishing line product; no coating or treatment typical of PFAS carriers.
⚠Risky category by default
Maxima
Ultragreen One Shot
Lubricant/chain oil (mineral or synthetic base)
Lower PFAS concern for a chain lubricant; minimal Teflon-family coating/waterproofing risk profile.
⚠Risky category by default
Seaguar
Blue Label
Fluorocarbon fishing line (monofilament)
Fluorocarbon fishing line may contain PFAS; insufficient public data to grade definitively.
⚠Risky category by default
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.