Old Navy Men's Go-Dry Cool Performance Boxer- Brief Underwear 3-Pack

Azo dyes and synthetic dye residues

No specific recalls or reported incidents for Old Navy boxer-briefs involving azo dyes. Nylon and polyester typically accept synthetic dyes without prohibited carcinogenic azo compounds, but pre-production testing data is not publicly available for this product line.

Formaldehyde resins in fabric finishes

Moisture-wicking treatments sometimes rely on formaldehyde-based cross-linking resins to fix hydrophobic or hydrophilic polymers to fiber surfaces. Old Navy does not disclose the finish chemistry, so presence cannot be ruled out. Exposure is typically minimal after initial laundering but can cause skin irritation in sensitive individuals.

Antimony in polyester

Polyester is synthesized using antimony trioxide as a catalyst; residual antimony may remain in finished fiber at trace levels (typically <0.1% but not guaranteed). Migration to skin under sweat conditions is very low but not independently tested for this product. No regulatory limit applies to antimony in textiles in most jurisdictions.

Microfiber shedding during laundering

Synthetic blends like nylon/polyester shed microfibers during every wash cycle, contributing to microplastic pollution. This is not a direct health risk to the wearer but a lifecycle concern; damage to product (pilling, wear) accelerates shedding.

Skin sensitization from undisclosed chemical treatments

Without disclosure of the moisture-wicking treatment agents, potential skin contact with residual surfactants, catalysts, or cross-linking compounds cannot be fully assessed. Incidence is rare but documented in some users of performance athletic wear; discontinuation and laundering typically resolve symptoms.