CLEARANCE - Stren Original Monofilament Line (300 yd)
Minimal concern. Standard nylon fishing line has no documented PFAS use.
Stren Original is standard monofilament nylon without known Teflon-family coating coatings or water treatments. Material type suggests lower risk than specialized coated products.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Monofilament nylon fishing line
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Material degradation and microplastic shedding
Nylon monofilament degrades under UV exposure and mechanical stress (casting, knot-tying), potentially releasing small polymer particles into aquatic environments. Risk is mainly environmental rather than to the user; end-of-life disposal is the primary concern.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
UV stabilizer leaching
Standard nylon monofilament may contain hindered amine light stabilizers (HALS) to prevent photodegradation, but these are not documented as leaching into water at significant levels during normal use. No testing or warnings are on record for this specific product.
Heavy metals
Fishing line formulations typically use organic dyes or no added colorant beyond the natural nylon base. No lead, cadmium, or other heavy metal contamination has been documented in commercial monofilament, and this is not a known manufacturing concern.
Source, FDA ↗Skin irritation from handling
Nylon monofilament does not off-gas volatile compounds and does not cause chemical irritation on skin contact. The main risk is mechanical (sharp edges from cutting), not chemical.
The full breakdown
What it's made of and why it matters
Stren Original is extruded nylon monofilament, a single continuous polymer strand used as fishing line. Nylon (polyamide 6 or 66) is a saturated hydrocarbon polymer with no known intentional additives in typical fishing line formulations. The material does not leach into water under normal fishing conditions because it is not designed to degrade and remains inert in aquatic environments. UV stabilizers may be present to prevent degradation from sunlight exposure, but these are not bioavailable during use.
The brand's record and disclosure
Stren is a long-established fishing line brand (owned by Pure Fishing/Newell Brands) with no documented product recalls or safety violations on record for this line. The company does not publish material safety datasheets or chemical transparency reports for consumer fishing line products. No certifications (organic, recycled content, eco-label) are claimed, reflecting the commodity nature of conventional monofilament. Brand stance on PFAS in fishing line formulations is not publicly disclosed.
How it compares in its category
Monofilament nylon fishing line is the industry standard and carries the same chemical profile across most major brands (Stren, Berkley, Trilene, Seaguar). Unlike braided lines (which use multiple fibers and adhesives) or fluorocarbon lines (which may contain different polymers), monofilament is chemically simple and stable. There are no meaningful safety advantages to premium brands in this category; composition is standardized by material science rather than brand differentiation.
If you buy it
Store in a cool, dry place away from direct sunlight to prevent UV degradation and brittleness. Inspect the line before each use for cracks, cloudiness, or loss of flexibility, which indicate age-related breakdown. Replace annually or after heavy use, as nylon loses tensile strength over time even in storage. Dispose of spent line responsibly (cut into short pieces, place in trash) to avoid wildlife entanglement; do not flush.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Stren has made none
Formulations change between production runs, so check the current label. How we grade.
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.