Alo Women's Black Xs 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. Alo Women's Black Xs One Piece Swimsuit carries a failing PFAS grade, and we never recommend buying a failing product.
Alo Yoga
Alo Women's Black Xs One Piece Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleAzo dyes and synthetic colorants
ReportedSpandex degradation and microfiber shedding
PossibleFormaldehyde-based finishing resins
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 Azo dyes and synthetic colorants, Spandex degradation and microfiber shedding, Formaldehyde-based finishing resins and Allergen sensitivity to spandex or dyes on the Alo Yoga and not on the Patagonia.
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Alo Yoga.
- The Alo Yoga is Nylon/spandex blend swimsuit fabric 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: 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