Women's Air Tech Performance Brief Panties 6-Pack vs Men's 3-Units Boxer Brief: which is safer?

Reebok Women's Air Tech Performance Brief Panties 6-Pack is our pick: better on PFAS and on the overall hazard picture.

Our pick

Reebok

Women's Air Tech Performance Brief Panties 6-Pack

PFAS grade

D 65/100

Overall grade

F 53/100

Verdict

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Hazard flags

⚑ 3

Material

nylon, spandex, cotton blend

Confidence

72%

PossibleFormaldehyde resins in fabric finishing

PossibleAzo dyes

PossibleElastomer degradation (spandex breakdown)

Why this grade

Under Armour

Men's 3-Units Boxer Brief

PFAS grade

D 65/100

Overall grade

F 43/100

Verdict

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Hazard flags

⚑ 4

Material

polyester/nylon blend with elastane

Confidence

72%

PossibleFormaldehyde-resin finishing (durable-press/wrinkle-resistant treatments)

PossibleAntimony in polyester (heavy metal catalytic residue)

ReportedElastane (spandex) degradation from heat and chlorine

Why this grade

Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →

More waterproof sports & performance undergarments: see the full ranking