Nike · Waterproof Sports Undergarments
Nike Men's Primary Dri-FIT Versatile Tank Top
Lower concern, but water-repellent coating finish PFAS status unknown from Nike.
Dri-FIT synthetic blend likely has a water-repellent coating, commonly PFAS-based, though Nike does not disclose chemistry. No third-party verification available.
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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 tank is polyester blend (likely 88% polyester, 12% spandex based on Nike's typical Dri-FIT construction) with a hydrophobic finish applied to repel sweat and moisture. Polyester itself is chemically stable when worn; the finish treatment, typically fluorocarbon-based water repellent (water-repellent coating), is where PFAS exposure risk concentrates. Dri-FIT is a mechanical moisture-wicking technology (not a chemical coating that leaches), so wear-related chemical shedding is low compared to heavily treated fabrics.
The brand's record and disclosure
Nike has not made public commitments to eliminate PFAS from apparel finishes as of 2024, despite pressure from NGOs. The company discloses general sustainability efforts but remains silent on water-repellent coating chemistry in technical wear. No recalls for formaldehyde, heavy metals, or azo dyes are on record for Dri-FIT tank tops. Nike's manufacturing is outsourced, making end-to-end chemical traceability difficult for consumers.
How it compares in its category
Moisture-wicking athletic tanks typically carry similar water-repellent coating-treatment risks; Nike's scale and quality control place it in the mid-to-upper tier relative to generic polyester tanks. Brands like Patagonia and some smaller athletic lines have committed to PFAS-free finishes, creating a differentiation point. Standard cotton tanks avoid water-repellent coating altogether but sacrifice moisture management. This product represents the industry norm, not an outlier for hazard.
If you buy it
Wash in cool water; avoid fabric softeners, which can deposit additional chemicals. The polyester-spandex blend holds up well through normal laundry (30-40 cycles typical lifespan before elastic degrades). Do not tumble dry on high heat, as it can damage the moisture-wicking finish and accelerate elastane breakdown. If worn during intense activity, rinse promptly to avoid salt and sweat buildup that degrades synthetic fibers.
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 (color fastness risk)
No recalls or testing data published for Nike Dri-FIT tanks on azo-dye content. Nike's supplier standards prohibit many restricted azo dyes, but independent verification is unavailable to consumers.
Formaldehyde-releasing resins (wrinkle resistance, fabric finishing)
Dri-FIT finishes do not typically require formaldehyde-based cross-linkers; no recalls recorded. Risk is low but not zero if legacy finishing agents were used at contract manufacturers.
Antimony in polyester (trace-level metal catalyst residue)
Antimony trioxide is a standard polymerization catalyst in polyester synthesis. Leaching into skin during wear is minimal under normal conditions; risk rises only if garment is heated excessively or damaged. Nike does not disclose antimony limits or testing.
Microplastic shedding (polyester fiber degradation)
All polyester textiles shed microfibers during washing. Dri-FIT's tighter weave reduces shedding compared to loose knits, but environmental (not direct health) impact remains. Synthetic fabrics do not bio-degrade; shedding is permanent per wash cycle.
water-repellent coating finish durability and unknown chemistry
Nike does not publish the specific fluorocarbon agent used in Dri-FIT water-repellent coating. Industry practice suggests C6 or C8 PFAS "forever chemicals"; finish degrades over 20-30 washes, reducing water repellency. Graded separately as PFAS; listed here as material degradation concern.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 55% 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.