New Balance · Sports Performance Undergarments
New Balance Pro Run Crew Socks
Lower concern for typical crew socks; no waterproofing expected.
Running socks typically use uncoated synthetic fibers without water-repellent coating treatment or stain resistance, reducing PFAS risk. New Balance has not publicly disclosed PFAS information for this product.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
polyester, nylon, elastane blend
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
clothing is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
These socks are a polyester-nylon-elastane blend, a standard athletic sock formulation. Polyester is a synthetic polymer that does not leach chemicals under normal wearing conditions; nylon and elastane (spandex) provide stretch and durability. The blend is durable and wash-resistant, meaning dyes and finishes are unlikely to migrate significantly into skin during use or laundering.
The brand's record and disclosure
New Balance has not published specific chemical disclosure or restricted substance lists for socks. The company does not appear to have faced recalls for formaldehyde, azo dyes, or antimony contamination in apparel. No certifications like OEKO-TEX or bluesign are publicly claimed for this specific product line, leaving uncertainty about finish testing.
How it compares in its category
Crew socks in the athletic/performance category typically use similar polyester-nylon blends. New Balance's positioning as a mainstream athletic brand suggests standard dyeing and finishing practices aligned with US apparel regulations, though independent testing data for this specific model is not readily available. The socks occupy a middle ground between budget alternatives and premium certified-organic options.
If you buy it
Wash new socks before first wear to remove residual dyes and finishes. Use warm water and standard detergent; elastane tolerates normal machine washing but degrades faster with repeated high-heat drying. Replace when elastic fails (typically 12-24 months of regular use). If anyone in your household has sensitive skin or dye reactivity, a patch wear test is reasonable before full rotation.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Azo dyes and colorant safety
No recalls or testing data available for New Balance crew socks specifically. US apparel regulations restrict certain azo dyes; standard commercial socks typically comply, but independent verification is absent for this product.
Formaldehyde in textile finishes
Athletic socks do not typically require formaldehyde-based wrinkle or shrink finishes. No public reports of formaldehyde issues in New Balance socks. Risk is inherently low for this product type.
Antimony in polyester
Antimony is used as a catalyst in polyester production but is not typically released during wear. No recalls or exposure incidents reported for standard athletic socks; migration risk is minimal under normal conditions.
Elastane (spandex) degradation and release
Elastane breaks down with exposure to sweat, chlorine, and heat over time, potentially shedding microfibers. This is a wear-related issue common to all elastic socks, not specific to New Balance, and affects foot comfort more than safety.
Residual dye and finish migration on skin
Unwashed socks may leave dye or chemical residue on skin, particularly in people with contact sensitivity. Pre-washing eliminates most risk and is standard best practice for new hosiery.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
More sports performance undergarments 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.