Women's Bottom Turn Racerback Bikini Top vs Joy One Piece Swimsuit: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Reformation Joy 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
Reformation
Joy One Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleAzo dyes in synthetic textiles
LikelyElastane degradation and microfiber shedding
PossibleHeavy metals in synthetic dyes and pigments
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Reformation.
- We flag Azo dyes in synthetic textiles, Elastane degradation and microfiber shedding and Heavy metals in synthetic dyes and pigments on the Reformation and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Reformation is Nylon/polyamide blend (likely nylon 6 or nylon 6,6) with elastane, 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