Rubylove First Period Kit +teen Period Underwear vs Women Intimates & Sleepwear Thinx Hiphugger Period Black: which is safer?
Rubylove First Period Kit +teen Period Underwear is the clear pick. Thinx Women Intimates & Sleepwear Thinx Hiphugger Period Black 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
Women Intimates & Sleepwear Thinx Hiphugger Period Black
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
ReportedUndisclosed water-repellent coating chemistry
PossibleFormaldehyde resins in textile finishing
PossibleAzo dyes and synthetic colorants
Where these two actually differ
- We flag Bacterial or fungal growth if improperly stored on the Ruby Love and not on the Thinx.
- We flag Undisclosed water-repellent coating chemistry, Formaldehyde resins in textile finishing, Azo dyes and synthetic colorants and Contact dermatitis or sensitization from coating or dyes on the Thinx and not on the Ruby Love.
- Both carry a flag for Coating degradation and microparticle shedding, so neither choice avoids it.
- The Ruby Love is organic cotton, waterproof backing layer where the Thinx is Cotton blend with unspecified water-repellent 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