for All Women's Comfort Brief Leakproof Period Underwear vs Basic Mid-Rise Period Brief: which is safer?
Modibodi Basic Mid-Rise Period Brief is the clear pick. Thinx for All Women's Comfort Brief Leakproof Period Underwear carries a failing PFAS grade, and we never recommend buying a failing product.
Thinx
for All Women's Comfort Brief Leakproof Period Underwear
PFAS grade
Poor 25/100
Overall grade
Bad 21/100
Verdict
Skip
Hazard flags
⚑ 1
Material
nylon/spandex blend with proprietary waterproof absorption layer
Confidence
42%
PossiblePFAS in waterproof treatment layer
Our pick
Modibodi
Basic Mid-Rise Period Brief
PFAS grade
Excellent 100/100
Overall grade
Excellent 92/100
Verdict
Buy
Hazard flags
⚑ 2
Material
organic cotton blend with water-resistant coating
Confidence
85%
PossibleWater-resistant coating degradation
PossibleMicrobial growth and odor with improper care
Where these two actually differ
- We flag PFAS in waterproof treatment layer on the Thinx 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 Thinx.
- The Thinx is nylon/spandex blend with proprietary waterproof absorption layer 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 Thinx grade, at 42% 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