Nike · Waterproof Sports Undergarments
Nike Men's Dri-FIT Ready Fitness T-Shirt
Lower concern for standard athletic tee, but water-repellent coating finish may contain PFAS.
Dri-FIT is a moisture-wicking polyester blend commonly treated with water/sweat-repellent coatings. Nike does not publicly disclose PFAS use in this product line, though water-repellent coating finishes often contain legacy PFOA or GenX alternatives.
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Material
polyester blend with Dri-FIT moisture-wicking treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
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
This shirt is a polyester blend (likely 88% polyester / 12% spandex or similar) treated with Nike's Dri-FIT moisture-wicking finish. Polyester itself is chemically stable once manufactured, but the applied finish coating and any dyes used in production are the primary chemical exposure points. The Dri-FIT treatment may include low-level PFAS compounds to aid water repellency, though this is not disclosed by Nike. Spandex content adds elasticity but introduces antimony catalysts (common in polyester production); residual levels in finished fabric are typically minimal.
The brand's record and disclosure
Nike has not publicly committed to PFAS-free formulations in athletic apparel and does not disclose the chemical composition of Dri-FIT treatments. The brand does source some products under stricter chemical management (e.g., some lines certified by Bluesign or OEKO-TEX), but this Dri-FIT tee is not advertised as certified to those standards. No major safety recalls or hazardous dye findings have been reported for current Nike athletic shirts. Nike's opacity on water-repellent coating chemistry is typical for the athletic apparel industry but remains a limitation for consumers seeking full transparency.
How it compares in its category
This product sits in the mainstream athletic tee market. It is chemically comparable to competitors (Adidas Climalite, Under Armour Tech, etc.), which use similar polyester blends with proprietary moisture-wicking treatments of undisclosed composition. Certified alternatives (e.g., Patagonia Capilene using OEKO-TEX standards) exist but cost more and are less widely available. For typical athletic wear, the hazard profile of this Nike tee is not unusually elevated relative to other major brands in the segment.
If you buy it
Wash in cold water before first wear to reduce loose dye and finish particles. Wash in cold water regularly (polyester dyes can bleed if exposed to high heat). Avoid prolonged high-temperature drying, as synthetic fibers degrade above 130F and may off-gas slightly; air dry or low-heat tumble dry is safer. Do not bleach or use fabric softeners, which can degrade the Dri-FIT finish and increase skin contact with coating residues. Replace after 50-100 washes or if fabric pilling or loss of water-repellency indicates coating breakdown.
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.”
Antimony in polyester fiber
Antimony is a common catalyst in polyester synthesis; residual levels in finished fabric are typically <1000 ppm and pose minimal risk during normal wear, but can leach slightly in acidic sweat environments on sensitive skin. No recalls of Nike apparel for antimony toxicity are on record.
Azo dyes and colorant safety
Nike does not publicly disclose dye chemistry for this product. Azo dyes that cleave to harmful amines are banned in the EU and by many certifications, but enforcement in imported US athletic wear varies. No specific safety finding for this shirt model is on record.
Formaldehyde in textile resins
The Dri-FIT finish may contain trace formaldehyde as a crosslinking agent to bind coating to fiber; typical levels in finished apparel are below 75 ppm (safe limit in many standards) after manufacture, but are not disclosed by Nike. Off-gassing decreases with washing.
Volatile organic compounds (VOCs) from finish coating
Moisture-wicking treatments can emit low-level VOCs (solvents, proprietary polymers) during the first few wears and washes. Odor and mild irritation may occur in sensitive individuals; this is typically not hazardous but can be reduced by pre-washing and airing the garment.
Microplastic shedding from fiber degradation
Polyester sheds microfibers with washing over time, a concern for environmental aquatic health rather than wearer health. High-heat drying and frequent washing accelerate this; cold, gentle washing and air drying reduce shedding.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% 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 waterproof sports 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.