Stren Review, Is Stren Non-Toxic?
Across 5 graded products, Stren averages Excellent (85/100). On disclosure, the brand says nothing publicly about PFAS. 5 of its products grade Good or better. Grades are model-based estimates, not lab results.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Worth buying from Stren Good or better, best-graded first
Stren
High Impact Monofilament Fishing Line 1275 Yards Lo-Vis Green 10 Pounds
Nylon monofilament fishing line
Nylon polymer degradation and microfiber shedding
Nylon monofilament degrades when exposed to UV and heat, potentially releasing…
Ingestion or choking hazard (mechanical, not chemical)
Fishing line presents a mechanical ingestion or entanglement risk if swallowed by…
Minimal concern. Standard nylon fishing line has no documented PFAS risk.
⚠Brand says nothing about PFAS
Stren
Original Monofilament Fishing Line - Hi-Viz Gold / 270 Yard / 17 lb
Nylon monofilament (extruded plastic line)
PFAS
Monofilament fishing line may incorporate PFAS-based surfactants or water-repellent…
Microplastic shedding during use
Monofilament fishing line sheds microscopic particles when handled, cut, or abraded…
UV degradation and brittleness
Nylon monofilament becomes brittle and prone to breakage after 6-12 months of sunlight…
Minimal concern; verify with Stren directly on coatings.
⚠Brand says nothing about PFAS
Stren
CLEARANCE - Stren Original Monofilament Line (300 yd)
Monofilament nylon fishing line
Material degradation and microplastic shedding
Nylon monofilament degrades under UV exposure and mechanical stress (casting…
Minimal concern. Standard nylon fishing line has no documented PFAS use.
⚠Brand says nothing about PFAS
Stren
(2 pack) Stren Original Monofilament Fishing Line, Clear/Blue Fluorescent, 12 lb Test Strength, 300 yd
nylon monofilament fishing line
UV degradation and brittle fragment shedding
Nylon monofilament becomes brittle with UV exposure and age, potentially releasing small…
Entanglement and environmental persistence
Monofilament fishing line is a recognized ocean litter hazard, causing entanglement in…
Lower concern. Nylon monofilament is not a material linked to PFAS.
⚠Brand says nothing about PFAS
Stren
Original Monofilament Fishing Line, Clear/Blue Fluorescent, 17 lb Test Strength, 1000 yd
Nylon monofilament fishing line
Nylon degradation and microplastic shedding
Aged or UV-damaged monofilament can fragment into microplastics, particularly under…
Minimal concern. Nylon monofilament typically avoids PFAS; verify with manufacturer.
⚠Brand says nothing about PFAS
Stren and PFAS, common questions
- Does Stren have PFAS?
- We graded 5 Stren products, averaging Excellent (85/100). 5 grade Good or better. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Stren non-toxic?
- Stren High Impact Monofilament Fishing Line 1275 Yards Lo-Vis Green 10 Pounds is the highest-graded Stren product we have scored, at 85/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Stren products are lower concern for PFAS?
- The highest-graded Stren products we have scored are Stren High Impact Monofilament Fishing Line 1275 Yards Lo-Vis Green 10 Pounds, Stren Original Monofilament Fishing Line - Hi-Viz Gold / 270 Yard / 17 lb, CLEARANCE - Stren Original Monofilament Line (300 yd). That is our model-based estimate from materials and public disclosure, not a lab test.
Every grade uses the same public rubric. How grades work →