PFAS20/ 100Bad
Overall16/ 100Bad
Bridgedale StormSock Midweight Knee

Bridgedale · Waterproof Hiking Socks

Bridgedale StormSock Midweight Knee

Bad

Lower concern choice, but Bridgedale's water-repellent coating treatment remains undisclosed. Contact brand for specifics.

Verdict: SkipWool-blend hiking sock with undisclosed water-repellent coating chemistry; no major textile hazards on record. Contact Bridgedale on PFAS treatment for full confidence.

Bridgedale StormSock Midweight Knee socks use wool-blend construction, which is inherently lower-risk for PFAS than synthetic-heavy designs. The brand doesn't publicly disclose what water-repellent coating finish is applied.

Still want this one anyway? Check the price on Amazon. We’d swap it.

Material

Wool blend with 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.

65/ 100
♾️

Category baseline

PFAS exposure happens more often with clothing products.

70/ 100
♾️

No PFAS disclosure

The company has not publicly discussed PFAS in this product.

85/ 100

water-repellent coating degradation and leachables

water-repellent coating finishes degrade with washing and wear, potentially releasing residual coating particles or absorbed chemicals. Without disclosure of the specific water-repellent coating agent, the chemical leaching profile after degradation cannot be assessed; this is a knowledge gap, not a confirmed hazard.

70/ 100

What’s reassuring

💨

Formaldehyde / VOCs

Wool blends sometimes carry formaldehyde-based binders in dyeing or finishing steps. No recalls or reports on record for Bridgedale StormSock; formaldehyde risk is standard across the wool-sock category but typically minimal after laundering.

Source: ATSDR
95/ 100
⛏️

Heavy metals

Bridgedale does not publicly report azo-dye testing or heavy metal limits in colorants. The product has no documented safety alerts; risk is consistent with mainstream European textile manufacturing standards, though independent verification is absent.

Source: FDA
95/ 100

Antimony in polyester (if present in blend)

If the wool blend includes synthetic fibers, antimony catalysts may be present in very small amounts. No evidence of antimony contamination in Bridgedale products; standard polyester in socks poses negligible exposure risk to skin.

95/ 100

Skin irritation from untreated or dyed fibers

Wool can irritate sensitive skin if lanolin is removed too aggressively or dyes are poorly rinsed. Bridgedale socks have no reports of dermatitis or allergic reactions; natural wool typically improves comfort after initial laundering.

95/ 100

The full breakdown

What it's made of and why it matters

Bridgedale StormSock Midweight Knee is a wool blend with a water-repellent coating (water-repellent coating) finish applied to the fabric surface. The wool component resists moisture absorption naturally and provides thermal regulation; the water-repellent coating enhances water shedding without the bulk of synthetic waterproof membranes. The exact water-repellent coating chemistry is not publicly disclosed by Bridgedale, which is the main transparency gap for this product.

The brand's record and disclosure

Bridgedale is a UK-based heritage sock manufacturer with no widely documented safety controversies or product recalls in the consumer safety literature. The brand does not publicly disclose water-repellent coating treatment chemistry or commit to PFAS-free standards on its website, representing a middle-ground approach typical of mid-market outdoor apparel brands. No certifications for chemical safety (e.g., OEKO-TEX, bluesign) are advertised for this model.

How it compares in its category

Most waterproof socks in this price and performance tier use either fluorocarbon-based water-repellent coating (PFAS-containing) or wax-based finishes. Bridgedale's silence on treatment type leaves uncertainty, but the brand's longevity and lack of recall history suggest manufacturing quality. Premium alternatives from brands like Smartwool or Icebreaker may offer OEKO-TEX certification; budget alternatives often use heavier synthetic blends.

If you buy it

Wash in cool water with mild detergent; avoid fabric softeners and bleach, which degrade water-repellent coating performance and may alter finish chemistry. Do not machine dry at high heat; air dry to preserve the wool and coating. Replace when elastic fails or moisture no longer sheds; water-repellent coating degrades with wear and repeated laundering, typically 1-2 seasons of regular use. Contact Bridgedale directly if PFAS content in the water-repellent coating treatment is a deciding factor for your purchase.

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

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Men's Mountaineer Classic Edition Maximum Cushion Crew Socks

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PFAS Grade65Good
Good

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

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PFAS Grade65Good
Good

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

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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

PFAS Grade65Good
Good

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.