Rachel Watercolor Stripe Scoop Back Swimsuit vs Women's Bottom Turn Racerback Bikini Top: which is safer?

Where these two actually differ

• We flag Azo dyes in watercolor stripe printing, Microplastic shedding from synthetic fiber, Formaldehyde-release resins in dye fixatives and Elastane (spandex) degradation under chlorine on the Onia and not on the Patagonia.
• We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Onia.
• The Onia is Nylon/polyamide blend (swimsuit fabric), likely with 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 Onia grade, at 35% confidence against 72%, because it discloses less.