Women's Squareneck One-piece vs Women's Bottom Turn Racerback Bikini Top: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. J.Crew Women's Squareneck One-piece carries a failing PFAS grade, and we never recommend buying a failing product.
J.Crew
Women's Squareneck One-piece
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUndisclosed water-resistant treatment chemicals
PossibleSpandex/elastane degradation and microfiber shedding
PossibleChlorine and saltwater interaction with treated fabric
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
Where these two actually differ
- We flag Undisclosed water-resistant treatment chemicals, Spandex/elastane degradation and microfiber shedding and Chlorine and saltwater interaction with treated fabric on the J.Crew and not on the Patagonia.
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the J.Crew.
- The J.Crew is Nylon/spandex blend swimwear where the Patagonia is Nylon/polyester blend with elastane (standard swimwear), 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, 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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