Rubylove First Period Kit +teen Period Underwear vs (2 pack) Thinx for All Period Underwear for Women, Super Absorbency, Black, S-xl, Women's, Size: Small: which is safer?
Rubylove First Period Kit +teen Period Underwear is the clear pick. (2 pack) Thinx for All Period Underwear for Women, Super Absorbency, Black, S-xl, Women's, Size: Small carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Ruby Love
Rubylove First Period Kit +teen Period Underwear
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleCoating degradation and microparticle shedding
PossibleBacterial or fungal growth if improperly stored
Thinx
(2 pack) Thinx for All Period Underwear for Women, Super Absorbency, Black, S-xl, Women's, Size: Small
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleWaterproof coating composition (undisclosed)
PossibleCoating degradation and leachates over time
Where these two actually differ
- We flag Coating degradation and microparticle shedding and Bacterial or fungal growth if improperly stored on the Ruby Love and not on the Thinx.
- We flag Waterproof coating composition (undisclosed) and Coating degradation and leachates over time on the Thinx and not on the Ruby Love.
- The Ruby Love is organic cotton, waterproof backing layer where the Thinx is Cotton/synthetic blend with proprietary waterproof 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 Ruby Love is the one to buy.
- We are less certain about the Thinx grade, at 35% confidence against 82%, 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