Rubylove First Period Kit +teen Period Underwear vs Super Hiphugger Women Period Underwear: which is safer?

Rubylove First Period Kit +teen Period Underwear is the clear pick. Thinx Super Hiphugger Women Period Underwear 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 Super Hiphugger Women Period Underwear

Thinx

Super Hiphugger Women Period Underwear

PFAS grade

Poor 25/100

Overall grade

Bad 0/100

Verdict

Skip

Hazard flags

⚑ 4

Material

gusset fabric with moisture-wicking treatment, composition unspecified

Confidence

42%

PossibleFormaldehyde-release resins in moisture-wicking finish

LikelyCoating degradation and fiber shedding over time

PossibleMicroplastics from synthetic fibers (if present)

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 Formaldehyde-release resins in moisture-wicking finish, Coating degradation and fiber shedding over time, Microplastics from synthetic fibers (if present) and Allergic contact dermatitis from undisclosed finish chemicals on the Thinx and not on the Ruby Love.
  • The Ruby Love is organic cotton, waterproof backing layer where the Thinx is gusset fabric with moisture-wicking treatment, composition unspecified, 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 42% 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