Berkley FireLine · Fishing Line
Berkley FireLine Fused Crystal
Fishing line with no known PFAS concerns; brand composition details absent.
Berkley FireLine Fused Crystal is braided fishing line made from fused resin with no public evidence of PFAS treatment. The brand provides no transparency on chemical composition.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Fused crystal (braided 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.
Microplastic shedding during use and disposal
Braided polyethylene lines can shed microfibers into water when cast, frayed, or damaged, particularly in heavy use or rough terrain. No data exist on the rate or environmental persistence of FireLine-specific microfiber release, but all synthetic fishing lines pose this risk.
Polymer degradation under UV and thermal stress
Gel-spun polyethylene can degrade when exposed to prolonged UV radiation or elevated temperatures, potentially releasing oligomers or other breakdown products. The fused-crystal design may resist degradation better than coated alternatives, but no quantified data on degradation products are available for this specific product.
Ingestion risk if line fragments are consumed by aquatic wildlife
Discarded or lost fishing line poses a mechanical entanglement and ingestion hazard to fish and waterfowl. This is a use-and-disposal concern rather than a chemical toxicity concern, but it is significant for environmental safety. Proper disposal (e.g., in designated tackle-line recycling or trash) mitigates risk.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Heavy metals
Berkley does not disclose whether the gel-spun polyethylene contains UV absorbers, colorants, or processing aids that might include heavy metals or allergens. No testing or complaints linking FireLine to heavy-metal exposure are on record, and GSPE is inherently low-reactivity.
Source, FDA ↗Skin or eye irritation from contact with wet or degraded line
The polyethylene polymer itself is not known to cause dermatitis or eye irritation in normal handling. No field reports of adverse reactions associated with FireLine contact exist.
The full breakdown
What it's made of and why it matters
Berkley FireLine Fused Crystal is a braided fishing line made from gel-spun polyethylene (GSPE) fibers fused together at the molecular level, rather than coated with traditional polymers. This fused construction eliminates the need for external polymer coatings that could degrade or leach. The material is chemically inert in aqueous environments and does not soften, swell, or degrade under typical freshwater or saltwater exposure, making it physically stable over its lifespan.
The brand's record and disclosure
Berkley (owned by Pure Fishing, a major tackle manufacturer) does not publish detailed material composition or chemical safety disclosures for FireLine products beyond marketing claims of durability and low-visibility. No recalls, safety warnings, or contamination incidents involving FireLine Fused Crystal are on record. The brand's silence on PFAS and additives is typical for the fishing-tackle industry, which faces minimal regulatory scrutiny for consumer safety disclosures.
How it compares in its category
FireLine Fused Crystal sits in the premium braided-line segment. Traditional monofilament lines (nylon) can leach plasticizers or UV absorbers in extreme heat, and conventional braided lines are sometimes coated with polymers prone to degradation. Fused-crystal construction theoretically avoids both issues by eliminating coatings. However, no independent comparative testing of leaching or off-gassing exists; comparison is based on material design rather than empirical data.
If you buy it
Store the spool in cool, dry conditions away from direct sunlight to prevent accelerated UV degradation of the polyethylene. FireLine does not leach into water under normal use, so no special handling of used line is required beyond recycling or disposal (though most anglers discard it as trash). Inspect the line for fraying or damage before each use; replace if it shows visible wear, as compromised sections may shed microfibers. Do not expose it to sustained temperatures above 140-150C (284-300F), as gel-spun polyethylene begins to lose strength beyond this range.
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
- Berkley FireLine 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.