Women's Bottom Turn Racerback Bikini Top vs Women's O-Ring Scoop Back One-Piece Swimsuit: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Tommy Hilfiger Women's O-Ring Scoop Back One-Piece Swimsuit carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Patagonia
Women's Bottom Turn Racerback Bikini Top
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleElastane (spandex) degradation under heat or chlorine
Tommy Hilfiger
Women's O-Ring Scoop Back One-Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFormaldehyde resins in textile finishing
PossibleAzo dyes and heavy metal pigments
PossibleAntimony trioxide catalyst residue
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Tommy Hilfiger.
- We flag Formaldehyde resins in textile finishing, Azo dyes and heavy metal pigments, Antimony trioxide catalyst residue and Elastic degradation and microparticle shedding on the Tommy Hilfiger and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Tommy Hilfiger is Polyester blend swimsuit fabric, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Patagonia is the one to buy.
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 swimwear: see the full ranking