Square Neck One Piece Swimsuit vs Women's Bottom Turn Racerback Bikini Top: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Hunza G Square Neck One Piece Swimsuit carries a failing PFAS grade, and we never recommend buying a failing product.
Hunza G
Square Neck One Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFormaldehyde resins (fabric finishing)
PossibleMicroplastic shedding
PossibleSpandex degradation products
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 Formaldehyde resins (fabric finishing), Microplastic shedding, Spandex degradation products and DWR finish leachables (non-PFAS alternatives) on the Hunza G and not on the Patagonia.
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Hunza G.
- The Hunza G is Nylon blend (likely nylon/spandex) with durable water-repellent (DWR) finish where the Patagonia is Nylon/polyester blend with elastane (standard swimwear), which is most of the difference in these two grades.
- The gap is 70 points, wide enough that this is not a close call, and the Patagonia is the one to buy.
- We are less certain about the Hunza G grade, at 45% confidence against 72%, because it discloses less.
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 →
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