Women's Super Leakproof Dream Boxers vs Basic Mid-Rise Period Brief: which is safer?
Modibodi Basic Mid-Rise Period Brief is the clear pick. Knix Women's Super Leakproof Dream Boxers carries a failing PFAS grade, and we never recommend buying a failing product.
Knix
Women's Super Leakproof Dream Boxers
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleTeflon-type coating or fluorochemical fume risk (if Teflon-type coating-based coating)
PossibleMicroplastic shedding from coating degradation
PossibleCoating leachates during wear or washing
Our pick
Modibodi
Basic Mid-Rise Period Brief
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleWater-resistant coating degradation
PossibleMicrobial growth and odor with improper care
Where these two actually differ
- We flag PTFE or fluorochemical fume risk (if PTFE-based coating), Microplastic shedding from coating degradation, Coating leachates during wear or washing and Lack of product lifecycle or end-of-life guidance on the Knix and not on the Modibodi.
- We flag Water-resistant coating degradation and Microbial growth and odor with improper care on the Modibodi and not on the Knix.
- The Knix is Fabric with waterproof/leak-resistant coating (unspecified chemistry) where the Modibodi is organic cotton blend with water-resistant coating, which is most of the difference in these two grades.
- The gap is 75 points, wide enough that this is not a close call, and the Modibodi is the one to buy.
- We are less certain about the Knix grade, at 45% confidence against 85%, 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 →
More period underwear: see the full ranking