Kotex · Incontinence Pads & Protection
Kotex Ultra Thin Pads
Waterproof backing raises PFAS concern; manufacturer silent on composition.
Kotex does not disclose PFAS content or use. The waterproof layer in ultra-thin pads typically requires hydrophobic treatment, often PFAS-based. No third-party certification available.
The safe swap
Tranquility
Tranquility Personal Care Pads 13.5" x 6.5", 96/Case
70/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
cellulose/absorbent polymer core with waterproof backing
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
period care is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Kotex Ultra Thin pads use a cellulose/wood pulp absorbent core with a superabsorbent polymer (likely sodium polyacrylate or cross-linked polyacrylic acid) to lock moisture. The waterproof backing is typically polyethylene or polypropylene film, which raises PFAS concern because water-repellent coatings on period products have been documented to contain PFOA/PFOS or next-generation PFAS alternatives. Cellulose itself is low-risk; the hazard concentration point is the backing layer.
The brand's record and disclosure
Kotex (Kimberly-Clark) has not publicly disclosed whether their waterproof backing contains PFAS, fluorochemicals, or alternatives. The brand does not advertise third-party certifications (e.g., Cradle to Cradle, GOTS, or PFAS-free credentials) specific to this product line. Kimberly-Clark has faced prior criticism for opacity on chemical use in feminine care products, though no major recalls or regulatory action on Kotex pads themselves are on record.
How it compares in its category
Most conventional period pads (Tampax, Always, U by Kotex, etc.) use similar polyethylene/polypropylene waterproof backings and have not disclosed PFAS testing. Organic/eco brands (Cora, Rael, Seventh Generation) often advertise PFAS-free or plastic-free claims but command higher cost. Kotex Ultra Thin is standard-market positioning: affordable, widely available, but with lower transparency than premium alternatives.
If you buy it
Store pads in a cool, dry place away from direct heat or sunlight to minimize any polymer degradation. No special handling is required; use and disposal follow normal practice. If you experience skin irritation, rash, or odor changes, consider switching brands or testing for latex or fragrance sensitivity (some Kotex variants include fragrance). Monitor for any product recalls via the FDA MedWatch database, though current risk is unquantified rather than documented.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
PFAS in waterproof backing
Waterproof coatings on period products are a known PFAS vector, but Kotex has not disclosed composition. Risk is plausible but unconfirmed for this specific product.
Synthetic polymer skin irritation (superabsorbent polymer contact)
Sodium polyacrylate is widely regarded as safe in absorbent products and approved for direct skin contact by FDA; no Kotex-specific adverse event pattern is documented.
Fragrance allergens (if scented variant)
Some Kotex products include fragrance; while Kotex does not use known banned allergens, fragrance mixtures can trigger contact dermatitis in sensitive users. Check product variant label.
Microplastic/polymer shedding during use
No evidence of surface breakdown or fiber shedding under normal use conditions specific to Kotex Ultra Thin. Polyethylene/polypropylene backings are inert under body temperature.
Dioxin/chlorine residue from bleaching
Kotex uses elemental chlorine-free (ECF) or total chlorine-free (TCF) bleaching practices per industry standard, and no dioxin detections in finished pads are on record.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Incontinence Pads & Protection
Tranquility
Personal Care Pads 13.5" x 6.5", 96/Case
Cellulose, wood pulp, absorbent core, adhesives
Lower PFAS concern. Typical absorbent pad with no known treatment.
⚠Risky category by default
Tranquility
Essential Booster Pads Heavy Absorbency, Long - 4-1/4 x 15 Inch (Case of 200)
cellulose/fluff pulp absorbent core with nonwoven layers
Lower concern. Core materials inherently PFAS-free, no evidence of water-repellent coating treatment.
⚠Risky category by default
Kotex
Absorbent Wrapped Liners
Cellulose-based absorbent core, wrapped nonwoven
Lower concern. No known PFAS use in standard absorbent liners.
⚠Risky category by default
More incontinence pads & protection grades
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.