Women's Bottom Turn Racerback Bikini Top vs Women's Luna Underwire Bandeau Cutout Swimsuit: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Reiss Women's Luna Underwire Bandeau Cutout 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
Reiss
Women's Luna Underwire Bandeau Cutout Swimsuit
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleAzo dyes and colorant toxicity
PossibleElastic degradation and microfiber shedding
PossibleFormaldehyde-based fabric finishes
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Reiss.
- We flag Azo dyes and colorant toxicity, Elastic degradation and microfiber shedding and Formaldehyde-based fabric finishes on the Reiss and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Reiss is Nylon, spandex blend (typical swimsuit construction), 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