Ingredient
Elastane / Spandex (8%)
Flagged in 1
Scout's take
Petroleum-derived polyurethane fiber. A 2025 study found underwear elastane contained BPA, BPS, and BPF at up to 52,967 ng/g. BPF migrates into sweat at 39.1%, BPS at 25.2% — actively leaching endocrine disruptors through thin groin skin.
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