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

Rubylove First Period Kit +teen Period Underwear

Ruby Love

Rubylove First Period Kit +teen Period Underwear

PFAS grade

Excellent 100/100

Overall grade

Excellent 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

organic cotton, waterproof backing layer

Confidence

82%

PossibleCoating degradation and microparticle shedding

PossibleBacterial or fungal growth if improperly stored

Thinx Women Intimates & Sleepwear Thinx Hiphugger Period Black

Thinx

Women Intimates & Sleepwear Thinx Hiphugger Period Black

PFAS grade

Poor 25/100

Overall grade

Bad 0/100

Verdict

Skip

Hazard flags

⚑ 5

Material

Cotton blend with unspecified water-repellent coating

Confidence

35%

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