Basic Mid-Rise Period Brief vs No Boundaries Boyshort Super Absorbency Period Underwear 2-Pack Womens: which is safer?

Modibodi Basic Mid-Rise Period Brief is the clear pick. No Boundaries Boyshort Super Absorbency Period Underwear 2-Pack Womens carries a failing PFAS grade, and we never recommend buying a failing product.

Our pick

Modibodi Basic Mid-Rise Period Brief

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

No Boundaries Boyshort Super Absorbency Period Underwear 2-Pack Womens

Proof

No Boundaries Boyshort Super Absorbency Period Underwear 2-Pack Womens

PFAS grade

Poor 25/100

Overall grade

Bad 0/100

Verdict

Skip

Hazard flags

⚑ 4

Material

Cotton blend with water-resistant coating

Confidence

55%

LikelyTeflon-type coating/fluorochemical water-resistant coating (PFAS precursors and compounds)

PossibleMicrofiber shedding from synthetic coating

PossibleBacterial growth under waterproof barrier if poorly maintained

Where these two actually differ

  • We flag Water-resistant coating degradation and Microbial growth and odor with improper care on the Modibodi and not on the Proof.
  • We flag PTFE/fluorochemical water-resistant coating (PFAS precursors and compounds), Microfiber shedding from synthetic coating, Bacterial growth under waterproof barrier if poorly maintained and Coating leaching into skin or bloodstream via absorption on the Proof and not on the Modibodi.
  • The Modibodi is organic cotton blend with water-resistant coating where the Proof is 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 Proof grade, at 55% 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