The Thong Period. in Microfiber For Light Flows. Black / 3X vs Rubylove First Period Kit +teen Period Underwear: which is safer?
Rubylove First Period Kit +teen Period Underwear is our pick: better on PFAS and on the overall hazard picture.
The Period Company
The Thong Period. in Microfiber For Light Flows. Black / 3X
PFAS grade
Good 70/100
Overall grade
Poor 40/100
Verdict
Buy with care
Hazard flags
⚑ 4
Material
Microfiber polyester blend
Confidence
72%
PossibleAzo dyes and color fastness
LikelyMicroplastic shedding
PossibleFormaldehyde finishing resins
Our pick
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
Where these two actually differ
- We flag Azo dyes and color fastness, Microplastic shedding, Formaldehyde finishing resins and Antimony catalyst residues on the The Period Company and not on the Ruby Love.
- We flag Coating degradation and microparticle shedding and Bacterial or fungal growth if improperly stored on the Ruby Love and not on the The Period Company.
- The The Period Company is Microfiber polyester blend where the Ruby Love is organic cotton, waterproof backing layer, which is most of the difference in these two grades.
- The gap is 30 points, wide enough that this is not a close call, and the Ruby Love is the one to buy.
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