Organic Cotton Waterproof Sports & Performance Undergarments, ranked by PFAS safety
All 16 cotton-based options in our waterproof sports & performance undergarments database, graded A to F and ranked safest first. None earn a buy-worthy grade yet, so start from the safest and check the swap suggestions.
Reebok
Women's Air Tech Performance Brief Panties 6-Pack
nylon, spandex, cotton blend
Lower concern, no known PFAS triggers identified in basic apparel.
⚠Risky category by default
Reebok
Men's 7 Pack Performance Boxer Briefs, Medium
Cotton blend, elastic waistband
Lower concern; basic boxer briefs with no known PFAS triggers.
⚠Risky category by default
Reebok
Men's Tech Comfort Sport Soft Boxer Briefs
Cotton/synthetic blend, no known treatment
Lower PFAS risk. Casual underwear typically avoids treatments.
⚠Risky category by default
Fruit of the Loom
Women's Breathable Cooling Stripes Brief Underwear
Cotton blend (likely cotton-polyester), no special coating disclosed
Lower concern. Basic underwear with no disclosed water-resistant treatment.
⚠Risky category by default
Fruit of the Loom
Men's 360 Stretch Max Flex Boxer Briefs
Cotton and elastane blend, no stated treatment
Lower concern; bare cotton blend with no waterproofing claimed.
⚠Risky category by default
Brooks
Brothers Men's Supima Cotton Boxer Briefs
Supima cotton, no surface treatment disclosed
Lower PFAS concern; basic cotton underwear unlikely to contain forever chemicals.
⚠Risky category by default
Brooks
Brothers Men's 3-Pack Cotton Boxers
100% cotton
Lower PFAS concern. Basic cotton boxers with no surface treatments.
⚠Risky category by default
Champion
Men's Stretchy Performance Boxer Briefs
Cotton blend, elastane stretch
Lower concern. Basic cotton blend underwear without chemical treatments.
⚠Risky category by default
Champion
Men's 3-Pack Flexible Fit Moisture-Wicking Boxer Briefs
Cotton blend with elastic/polyester, moisture-wicking treatment unspecified
Lower concern. Base material safe, treatment agents undisclosed.
⚠Risky category by default
Champion
Men's Breathable Mid-Leg Boxer Briefs
cotton/synthetic blend, no stated treatment
Lower concern. No waterproof coating typical for breathable boxers.
⚠Risky category by default
Gap
Men's 5" Boxer Briefs
Cotton blend, elastic waistband
Lower concern; standard underwear with no known PFAS triggers.
⚠Risky category by default
Gap
Women's Breathe Shorty
Cotton blend (breathable apparel, no water-resistant treatment stated)
Lower concern. Uncoated cotton blend, no water-repellent coating finish disclosed.
⚠Risky category by default
Gap
Women's Breathe Hipster
Cotton blend hipster underwear, no reported treatment
Lower concern. Basic cotton blend with no disclosed water or stain treatment.
⚠Risky category by default
Gap
Women's Breathe Hipster Underwear 3-Pack
cotton, elastane blend, uncoated fabric
Lower PFAS concern. Bare cotton underwear unlikely to contain intentional PFAS.
⚠Risky category by default
Under Armour
Men's Under Armour Charged Cotton 6-inch Novelty Boxerjock 3-Pack
Cotton blend (Charged Cotton proprietary fabric)
Lower PFAS concern. Cotton boxers unlikely to contain intentional PFAS.
⚠Risky category by default
Under Armour
Men's 3-Pack Performance Cotton Boxerjock
Cotton blend with elastane
Lower concern. Bare cotton-blend undergarment with no performance coating.
⚠Risky category by default
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