Bridgedale · Waterproof Hiking Socks
Bridgedale Men's StormSock Waterproof Heavyweight Boot Socks
High PFAS risk. Waterproofing likely contains PFAS. No public disclosure or testing available.
Bridgedale StormSock is marketed as waterproof, which typically requires a water-repellent coating historically PFAS-based. The brand doesn't disclose the specific water-repellent coating chemistry or provide PFAS-free claims.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Merino wool blend with water-repellent coating (water-repellent coating) finish
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Waterproof / stain-resistant treatment
Water-repellent treatments have historically contained PFAS chemicals.
Category baseline
PFAS exposure happens more often with clothing products.
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Formaldehyde / VOCs
Polyester or nylon components may contain residual formaldehyde from dyes or finishing agents. Bridgedale does not publish test data for this product; Merino-blend socks from transparent manufacturers typically test negative or at trace levels after washing.
Source: ATSDR ↗Heavy metals
Dark dyes on black or charcoal StormSock variants may include azo compounds or lead/cadmium; no independent testing on record. Merino wool socks from certified low-impact manufacturers generally test clean, but Bridgedale's lack of certification makes this unverified.
Source: FDA ↗Degradation and microfiber shedding during washing
Merino-synthetic blends shed microfibers with repeated washing, particularly if water-repellent coating degrades. Microfiber pollution is an environmental hazard rather than direct consumer risk, but frequent washing accelerates both water-repellent coating loss and fiber release.
PFAS
No independent lab testing of this product is publicly available. Industry standard for waterproof socks assumes fluorinated water-repellent coating; Bridgedale's silence suggests conventional PFAS rather than a marketed alternative, but this is inference based on market practice, not confirmed.
Source: ATSDR ↗What’s reassuring
Antimony in polyester content
Antimony is used as a catalyst in polyester synthesis but is not typically a leaching hazard in finished textiles worn on skin. No evidence of antimony migration in sock products; skin barrier protects against contact.
The full breakdown
What it's made of and why it matters
Bridgedale StormSock is a Merino wool blend (typically 50-70% Merino, balance synthetic fibers like nylon or polyester) treated with a water-repellent coating (water-repellent coating) finish. Merino wool itself is well-tolerated on skin and naturally moisture-wicking. The water-repellent coating is the chemical concern: waterproofing finishes on textiles have historically relied on fluorinated compounds (PFAS), though some manufacturers now use Teflon-type coating-free alternatives. Bridgedale does not publicly disclose which water-repellent coating chemistry is used in this product.
The brand's record and disclosure
Bridgedale (owned by Cascade Designs) has not published a public stance on PFAS elimination or chemical transparency for its sock line. The brand does not appear in major chemical disclosure initiatives (Cradle to Cradle, Bluesign, OEKO-TEX) for this specific product. No recalls or contamination incidents are on record for Bridgedale socks. The lack of transparency on water-repellent coating chemistry is typical of mid-tier outdoor brands but notable given growing consumer and regulatory pressure on waterproof textiles.
How it compares in its category
Waterproof hiking socks occupy a narrow market; most major brands (Smartwool, Darn Tough, Icebreaker) similarly do not disclose water-repellent coating formulation. Premium alternatives like Patagonia and REI Co-op lines have begun moving toward PFAS-free or certified low-fluorine water-repellent coating treatments, though cost is higher. Bridgedale is positioned as quality-focused and mid-range; its silence on water-repellent coating chemistry suggests no proactive shift away from conventional PFAS finishes. Merino content is comparable to competitors.
If you buy it
Wash in cool water and avoid hot dryers, which can degrade both the Merino and water-repellent coating; air dry is best. Replace every 1-2 years of heavy use or when moisture beads no longer form on the surface (sign of water-repellent coating loss). Do not dry-clean or use fabric softeners. If PFAS exposure is a concern, consider requesting product documentation from Bridgedale directly or choosing brands with published PFAS-free waterproofing certifications.
What we don’t know
- Basis
- Model estimate, 62% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Bridgedale has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Waterproof Hiking Socks
Smartwool
Men's Mountaineer Classic Edition Maximum Cushion Crew Socks
Merino wool blend (primary natural fiber)
Lower PFAS concern. Natural wool fiber with no waterproofing treatment flagged. No explicit PFAS disclosure.
⚠Risky category by default
Smartwool
Men's Hike Full Cushion Crew Socks
Merino wool blend (merino wool, nylon, elastane)
Lower PFAS concern. Natural fiber socks unlikely to need water-repellent coating. Smartwool's lack of disclosure leaves room for uncertainty.
⚠Risky category by default
Smartwool
Men's Hike Classic Edition Full Cushion Crew Socks
Merino wool blend (primary fiber); no reported water-repellent coating (water-repellent coating) or stain treatment disclosed
Lower PFAS concern. Plain wool socks with no disclosed treatments, but verify fiber content if it matters.
⚠Risky category by default
More waterproof hiking socks 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.