Under Armour · Sports Performance Undergarments
Men's Under Armour Performance Tech Mesh-Mod 6 in 3 Pack
Performance athletic mesh without waterproofing, lower PFAS concern than water-repellent coating gear.
These basic moisture-wicking polyester-nylon mesh shorts lack water-resistant or stain-resistant finishes. Under Armour makes no public PFAS claims, and the product carries lower risk than treated apparel.
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Material
polyester mesh, nylon blend
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Men's Under Armour Performance Tech is made of, ingredients and materials
This product is polyester mesh blended with nylon, a synthetic fiber combination common in performance athletic underwear. Polyester itself is chemically stable during normal wear and washing. The mesh construction (open weave) means minimal fabric density, reducing potential for trapped moisture or bacterial growth compared to dense synthetic fabrics. No waterproofing or water-repellent coating (water-repellent coating) coating is applied, which eliminates the primary vector for PFAS contamination in performance textiles.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Formaldehyde / VOCs
No public disclosure from Under Armour confirms or excludes formaldehyde-based finishing treatments on this mesh. If present, off-gassing during first washes would be minimal. Standard washing will remove residual formaldehyde within 2-3 cycles.
Source, ATSDR ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Azo dyes in polyester
Polyester mesh boxer briefs typically use reactive dyes rather than azo dyes, and this product carries no public report of azo dye use or associated health incidents. Risk is low for this garment type and color range.
Antimony in polyester
Antimony (a polymerization catalyst in polyester production) remains locked in the polymer matrix and does not leach during wear or washing. No hazard is established for standard polyester apparel.
Flame retardants
Underwear is not a regulated flame-retardant product category in most jurisdictions. No flame retardant treatment is standard for men's boxer briefs, and none is disclosed or publicly reported for this product.
Source, EPA ↗Phthalates
Waistband elastic is typically thermoplastic polyurethane or spandex; phthalate use in apparel elastic has declined sharply. No specific incident or disclosure connects Under Armour boxer briefs to phthalate risk.
Source, ATSDR ↗The full breakdown
The brand's record and disclosure
Under Armour has not publicly disclosed detailed chemical composition or flame retardant/antimicrobial treatment protocols for their baseline apparel lines. The company does not hold major third-party certifications like BLUESIGN or OEKO-TEX for standard underwear products. No recalls or substantiated contamination incidents have been reported for Under Armour boxer briefs in public databases. The brand's silence on PFAS is typical for non-waterproofed athletic wear, where such treatments are not necessary.
How it compares in its category
Men's synthetic boxer briefs are a commodity category with fairly uniform material profiles across brands. Under Armour's mesh-mod design is mid-range for athletic underwear; it sits between basic polyester briefs and premium merino-blend or modal alternatives. Most polyester boxer briefs at this price point carry equivalent chemical risk profiles. The absence of special coatings (waterproofing, moisture-wicking treatments) actually puts this product at lower chemical risk than branded performance underwear with added functional finishes.
If you buy it
Wash in warm water with standard detergent; synthetic underwear does not require special care. Polyester mesh can withstand machine drying on low to medium heat without degradation. Replace when elastic loses tension or mesh develops permanent odor despite washing, typically after 1-2 years of regular use. No special storage precautions are needed. If skin irritation occurs, it is more likely due to detergent residue than fiber chemistry; rinse thoroughly and consider a fragrance-free wash.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Under Armour has made none
Formulations change between production runs, so check the current label. How we grade.
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.