U by Kotex BioCare Ultra Thin Overnight Pads with Wings, Heavy Absorbency
Brand silent on PFAS. Pad materials typically lower concern, but no verification.
U by Kotex provides no public PFAS disclosure for this product. Standard pad materials (cellulose, polypropylene) carry lower inherent concern, but absence of testing or certification limits confidence.
The better-graded swap
Natracare
Natracare Organic Pads
100/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
cellulose, absorbent core, polypropylene, adhesive
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
What U by Kotex BioCare Ultra Heavy Absorbency is made of, ingredients and materials
U by Kotex BioCare Ultra Thin uses a cellulose-based absorbent core, polypropylene backing and top sheet, and adhesive to secure the pad to underwear. Cellulose is plant-derived and does not bioaccumulate; polypropylene is a common plastic in period products and does not leach significant chemicals at body temperature or contact duration. The adhesive formulation is not publicly detailed, but standard pressure-sensitive adhesives in pads do not pose established acute or chronic hazards with correct use.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Chlorine residue from bleaching
Cellulose cores are typically bleached during manufacturing. Residual chlorine levels in finished pads are not publicly tested or reported by the brand. Unbleached alternatives exist but are not the standard in U by Kotex products.
Allergic or irritant reactions to undisclosed components
Because U by Kotex does not list all ingredients, individuals with sensitivities cannot pre-screen for common irritants like synthetic fragrances, dyes, or latex. Reaction rates in menstrual pads are low but underreported; those with known sensitivities should patch-test or switch to fully transparent brands.
Microbial growth from prolonged wear or storage
This is a use-behavior hazard, not a product defect. Pads worn beyond 8 hours or stored in hot, humid conditions can support bacterial growth, raising infection risk. Proper storage and timely changes mitigate this entirely.
What’s reassuring
Adhesive composition and skin contact
U by Kotex does not disclose the adhesive formulation. Standard pressure-sensitive adhesives in pads are not known to leach harmful substances at skin contact temperature; no recalls or widespread complaints linked to adhesive are on record for this product.
Polypropylene degradation or particulate shedding
Polypropylene is chemically stable and does not break down into microplastics at body temperature or normal contact duration. No evidence of shedding or degradation is on record for this product or format.
How is this PFAS grade calculated?
The brand's record and disclosure
U by Kotex (Kotex, owned by Kimberly-Clark) does not publish ingredient transparency or third-party safety certifications for this product line. The brand has not issued public commitments on PFAS elimination in period care, though it has faced consumer inquiries on chemical content. No major recalls or substantiated safety incidents are on record for this product. Competitors like Seventh Generation and Cora publish fuller ingredient lists; U by Kotex's silence reflects industry norms rather than an outlier position.
How it compares in its category
Overnight pads with wings are among the lowest-concern formats in menstrual care because they minimize internal contact and rely on external absorption. This product's cellulose core is standard across the category; synthetic absorbents (gel polymers, rayon) carry no higher documented risk. Unbleached or organic cotton alternatives may reduce chlorine residue concerns, but data on health benefit are limited. U by Kotex BioCare sits in the mid-tier of disclosure and material choice within mainstream brands.
If you buy it
Change pads every 4-8 hours or as needed; prolonged wear increases infection risk, not chemical hazard. Store in a cool, dry place away from high heat or humidity, which can degrade packaging and expose adhesive. Discontinue use if itching, rash, or irritation develops, as these may signal sensitivity to adhesive or an individual reaction rather than a batch defect. If you prefer higher transparency, look for brands that publish chemical lists or carry certifications like Cradle to Cradle or Safer Choice labeling.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- U by Kotex has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to U by Kotex BioCare Ultra Thin Overnight Pads with Wings, Heavy Absorbency?
- A third party reports verifying it as PFAS-free
- Fragrance allergens (if scented variant)
2 hazards checked on this product, all on its full breakdown.
- organic cotton with natural fibers
- The brand calls it PFAS-free, which we have not verified
- Microplastics
Organyc
100% Certified Organic Cotton Tampons Cardboard Applicator
- 100% organic cotton with cardboard applicator
- We found no PFAS statement from the brand
- Cardboard applicator structural integrity over time
More period care grades
100Seventh Generation Maxi Pads - Overnight
70Lola 100% Organic Cotton Tampons Applicator Free
70Lola 100% Organic Cotton Tampons Cardboard Applicator
70August Organic Cotton Top Layer Pads, 36-Pack Regular
70Aunt Flow Organic Cotton Cardboard Applicator Tampons
60U by Kotex Bamboo Ultra Thin Pads with Wings, Heavy Absorbency
60Kotex Maxi Pads
60U by Kotex Security Lightdays Liners
60U by Kotex Ultra Thin Pads with Wings, Heavy Absorbency
70Cora Organic TamponsCompare vs Natracare →All period care →How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.