Under Armour · Sports Performance Undergarments
Under Armour Men's 3-Pack Performance Cotton Boxerjock
Lower concern. Bare cotton-blend undergarment with no performance coating.
These basic cotton-elastane boxers lack water-repellent or stain-resistant treatment. No PFAS disclosure exists from the brand, and the material itself carries minimal risk.
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Material
Cotton blend with elastane
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Under Armour Men's 3-Pack Performance is made of, ingredients and materials
This product is a cotton-elastane blend (likely 85-90% cotton, 10-15% spandex/elastane) with no water-resistant or moisture-wicking coating, which eliminates the primary vector for PFAS in performance apparel. The elastane provides stretch and shape retention; cotton is inherently breathable and low-risk. No fluorochemical treatments are typical for basic boxerjocks in this category, making chemical leaching during wear or laundering unlikely.
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.
Heavy metals
All colored cotton textiles use synthetic dyes; concern is lowest for neutral or light colors (white, gray, black) and highest for deep reds, yellows, or oranges. Under Armour products sold in the US and EU are subject to OEKO-TEX or equivalent restrictions on banned azo compounds, but formal certification is not publicly stated for this line.
Source, FDA ↗Elastane (spandex) degradation and dermal irritation
Elastane fibers can degrade from UV exposure, heat, chlorine, and friction, potentially releasing microscopic fibers or oligomers. Skin contact irritation is rare but possible in individuals with sensitive skin or latex cross-reactivity; no specific reports for Under Armour products.
Microplastic shedding during washing
Cotton fibers themselves do not accumulate microplastics, but elastane shedding from repeated washing is a known environmental concern. Individual risk to wearer is minimal; environmental impact occurs post-consumer.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
Cotton-blend boxerjocks typically do not receive formaldehyde-based finishing treatments because elastic and comfort fit prioritize softness over wrinkle resistance. No public record of formaldehyde finish on Under Armour basic undergarments.
Source, ATSDR ↗Antimony in polyester fiber
This product is predominantly cotton with elastane, not polyester. Antimony is not a concern for this material composition.
The full breakdown
The brand's record and disclosure
Under Armour does not publicly disclose detailed chemical inventories or restricted substance lists specific to basic undergarments. The brand has no widely documented recalls or lawsuits tied to formaldehyde, azo dyes, or heavy metal pigments in base-layer products. Like most major athletic brands, Under Armour has faced scrutiny over supply-chain labor and sustainability but not product toxicity in this category.
How it compares in its category
Cotton-blend boxerjocks are among the lowest-risk textile products because they lack performance coatings, antimicrobial treatments, or heavy dyes. This product sits in the middle of the market, more affordable than premium merino or specialty fabrics, but equally compliant with standard dyeing and finishing regulations in the US and EU. No brands in this segment offer meaningfully superior chemical transparency.
If you buy it
Wash in warm water with standard detergent; elastane degrades in high heat and chlorine bleach, so avoid both. Expect the elastic to lose tension after 50-100 washes due to the nature of spandex, not chemical breakdown. Replace when waistband or leg openings no longer provide snug fit. Air dry when possible to extend elastane lifespan; machine drying on low heat is acceptable but accelerates wear.
What we don’t know
- Basis
- Model estimate, 78% 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.