Women's Bottom Turn Racerback Bikini Top vs Women's Alma One-Piece Swimsuit: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Solid & Striped Women's Alma 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
Solid & Striped
Women's Alma One-Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleAzo dyes and colorant safety
PossibleFormaldehyde or formaldehyde releasers in finishes
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Solid & Striped.
- We flag Azo dyes and colorant safety and Formaldehyde or formaldehyde releasers in finishes on the Solid & Striped and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Solid & Striped is Nylon/spandex 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 →
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