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

Where these two actually differ

• We flag Formaldehyde resins in fabric finishes, Antimony in polyester, Microfiber shedding during laundering and Skin sensitization from undisclosed chemical treatments on the Old Navy and not on the Reebok.
• We flag Formaldehyde resins in fabric finishing, Azo dyes and Elastomer degradation (spandex breakdown) on the Reebok and not on the Old Navy.
• The Old Navy is Nylon/polyester blend with moisture-wicking treatment where the Reebok is nylon, spandex, cotton blend, which is most of the difference in these two grades.
• The gap is 45 points, wide enough that this is not a close call, and the Reebok is the one to buy.
• We are less certain about the Old Navy grade, at 45% confidence against 72%, because it discloses less.