Women's Bottom Turn Racerback Bikini Top vs Women's Long Sleeved Swell Seeker One Piece Swimsuit: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Patagonia Women's Long Sleeved Swell Seeker 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
Patagonia
Women's Long Sleeved Swell Seeker One Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
Possiblewater-repellent coating finish chemistry (PFAS-alternative unstated)
PossibleElastic degradation and skin irritation
PossibleMicroplastic shedding from wear
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Patagonia.
- We flag DWR finish chemistry (PFAS-alternative unstated), Elastic degradation and skin irritation and Microplastic shedding from wear on the Patagonia and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Patagonia is Nylon/polyamide with DWR (durable water-repellent) finish, 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 Patagonia is the one to buy.
Both products run through the same public rubric, which covers 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 →
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