Non-Toxic Period Underwear, ranked by PFAS grade
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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.
54 of the 94 period underwear products PFAS Authority has graded score below its 70 point pass mark for PFAS and other toxins, 57.4% of the category, as of October 2026, leaving 40 that pass. The highest graded is Ruby Love Rubylove First Period Kit +teen Period Underwear at 100 out of 100.
The full ranking is below, best-graded first, with every score linking to the evidence behind it.
Is period underwear safe?
40 of the 94 period underwear products we graded come back low-concern on our screen and 54 do not. Our grades are model-based assessments built from published materials, ingredient lists, certifications and brand disclosures, not laboratory tests, so they say what we can evidence rather than that anything is safe.
Best graded period underwear here
- 1Ruby Love Rubylove First Period Kit +teen Period Underwear 100 out of 100
- 2Lunapads 3-Pack BOOST Brief 100 out of 100
- 3Aisle Super Hipster 100 out of 100
Start here
The best non-toxic period underwear, ranked by grade
Buyer’s guide
What to look for in period underwear, and which brands grade best and worst
Period Underwear, ranked.
The quickest read, what to skip and the top-graded picks worth buying instead.
Bambody
Absorbent Brief Super Comfy Period Underwear for Women
Skip until brand discloses absorbent layer composition and coating chemistry.
Lola
Organic Cotton Period Underwear
Brand PFAS statement on record, which we have not verified.
Ruby Love
Rubylove First Period Kit +teen Period Underwear
Lower concern. Third-party verified PFAS-free period underwear.
Why Ruby Love Rubylove First Period Kit +teen wins, and what it beats
Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 3 products it beats, so you can see exactly where the 75 points between the top and the bottom of this period underwear ranking come from.
The winner
Made of organic cotton, waterproof backing layer.
- +35Waterproof / stain-resistant treatment. Water-repellent coating treatments have historically used PFAS.
- +25Category baseline. The starting point for this type of product, before anything specific to this product is counted.
- -30Third-party PFAS-free verification. A third party reports verifying this product as PFAS-free.
- -40No PFAS found in lab test. No PFAS detected in independent testing.
What the grade does not fix. It still carries one risk factor, Waterproof / stain-resistant treatment, and our graders recorded 2 other hazards on it. See the full breakdown.
What it beats, and why
What puts it behind. The winner earns -40 points for No PFAS found in lab test. We found nothing comparable published for this product.
Made of organic cotton with gusseted absorbent layer.
- +25Category baseline
- -10Brand-stated PFAS-free. The brand states this product is PFAS-free. We have not verified the claim.
- -10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.
5risk points, a grade of 95
What puts it behind. No PFAS disclosure, +15 points. No public statement from the brand about PFAS in this product. The winner carries no such factor.
Made of 100% organic cotton topsheet.
- +25Category baseline
- +15No PFAS disclosure
- -10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.
30risk points, a grade of 70
What puts it behind. No PFAS disclosure, +15 points. No public statement from the brand about PFAS in this product. The winner carries no such factor.
Made of Cotton blend with water-resistant coating.
- +35Waterproof / stain-resistant treatment
- +25Category baseline
- +15No PFAS disclosure
75risk points, a grade of 25
No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.
Which period underwear is PFAS-free? Good or Excellent, best-graded first
- organic cotton, waterproof backing layer
- A third party reports verifying it as PFAS-free
- Coating degradation and microparticle shedding
2 hazards checked on this product, all on its full breakdown.
- organic cotton blend, water-resistant gusset
- The brand calls it PFAS-free, which we have not verified
- Microplastic shedding from water-resistant barrier
- Organic cotton, wood pulp fiber
- The brand calls it PFAS-free, which we have not verified
- Azo dyes and synthetic dyes
2 hazards checked on this product, all on its full breakdown.
- organic cotton, bamboo, gusseted absorbent layers
- The brand calls it PFAS-free, which we have not verified
- Formaldehyde / VOCs
4 hazards checked on this product, all on its full breakdown.
Lunam Hipster Brief Light Flow
- organic cotton blend, no water-repellent coating
- The brand calls it PFAS-free, which we have not verified
- Elastane/spandex degradation under stress
2 hazards checked on this product, all on its full breakdown.
- organic cotton with gusseted absorbent layer
- The brand calls it PFAS-free, which we have not verified
- Formaldehyde / VOCs
4 hazards checked on this product, all on its full breakdown.
- organic cotton blend with water-resistant coating
- The brand calls it PFAS-free, which we have not verified
- Water-resistant coating composition (unspecified chemistry)
4 hazards checked on this product, all on its full breakdown.
- absorbent fabric blend with proprietary waterproof barrier
- The brand calls it PFAS-free, which we have not verified
- Undisclosed waterproof barrier chemistry
3 hazards checked on this product, all on its full breakdown.
- textile base with water-resistant/leak-proof coating (type unspecified)
- The brand calls it PFAS-free, which we have not verified
- Coating degradation and microplastic shed
3 hazards checked on this product, all on its full breakdown.
- Fabric blend with waterproof/leak-resistant coating (type unspecified)
- The brand calls it PFAS-free, which we have not verified
- Coating degradation and functional loss
4 hazards checked on this product, all on its full breakdown.
- Organic cotton, lycra blend with waterproof gusset treatment
- The brand calls it PFAS-free, which we have not verified
- Waterproof gusset treatment (unspecified chemistry)
- Organic cotton blend with unspecified waterproof/absorbent coating
- The brand calls it PFAS-free, which we have not verified
- Unidentified waterproof coating chemistry
2 hazards checked on this product, all on its full breakdown.
Aisle
Best-Selling Leakproof Period Boxer Brief - Essential Boxer Essential Boxer Eucalyptus / 2X
- Cotton blend with unspecified waterproof/leakproof coating
- The brand calls it PFAS-free, which we have not verified
- Coating degradation and material shedding
3 hazards checked on this product, all on its full breakdown.
Aisle
Essential High-Rise Period Brief, Leakproof Underwear Essential Brief Black / S
- Unspecified waterproof/leak-resistant coating on undisclosed base textile
- The brand calls it PFAS-free, which we have not verified
- Microplastics
2 hazards checked on this product, all on its full breakdown.
- Organic cotton with waterproof leak-proof lining
- The brand calls it PFAS-free, which we have not verified
- Waterproof lining degradation and leachables
3 hazards checked on this product, all on its full breakdown.
- 100% organic cotton topsheet
- We found no PFAS statement from the brand
- Undisclosed core and backing materials
2 hazards checked on this product, all on its full breakdown.
- organic cotton with absorbent gusset
- We found no PFAS statement from the brand
- Azo dyes in textile coloring
5 hazards checked on this product, all on its full breakdown.
- organic cotton, modal blend with gusset absorbent layers
- We found no PFAS statement from the brand
- Azo dyes in synthetic components or absorbent layers
4 hazards checked on this product, all on its full breakdown.
- organic cotton with gusset lining
- We found no PFAS statement from the brand
- BPA & bisphenols
2 hazards checked on this product, all on its full breakdown.
- cotton
- We found no PFAS statement from the brand
- Azo dyes and synthetic dye residues
3 hazards checked on this product, all on its full breakdown.
- Organic cotton and viscose
- We found no PFAS statement from the brand
- Azo dyes in viscose or cotton dyes
3 hazards checked on this product, all on its full breakdown.
- bamboo viscose or cotton blend
- We found no PFAS statement from the brand
- Azo dyes (allergen/skin sensitization)
2 hazards checked on this product, all on its full breakdown.
- Cotton blend, elastic waistband
- We found no PFAS statement from the brand
- Azo dyes in synthetic fibers
4 hazards checked on this product, all on its full breakdown.
- organic cotton, adhesive/binding unspecified
- We found no PFAS statement from the brand
- Adhesive composition undisclosed
2 hazards checked on this product, all on its full breakdown.
- 70Cora Organic Top Sheet Thong Regular Ultra Thin Panty Liners
- 70The Period Company The High Waisted Period. in Cotton For Medium Flows Women's
- 70Dear Kate Women's Dear Kate Billie Hipster Full Panty
- 70Dear Kate Women's FSA-Eligible Dear Kate Period Underwear Ada Brief Full
- 70Hanes Girls Comfort Period Moderate Protection Hipster Underwear Assorted 4-Pack
- 70Hanes Comfort Period. Women's Underwear High-Cut Pack
- 70The Period Company Bikini Heavy Flow Women's
- 70The Period Company The Thong Period. in Sporty Stretch For Light Flows
- 70 Period Boxer Brief
- 70The Period Company The Thong Period. in Microfiber For Light Flows. Black / 3X
- 70Love Luna Period Full Brief
- 70Lunapads BOOST Boxer Period Underwear
- 70Rael Organic Cotton Disposable Period Underwear
- 70Saalt Amazon.com: Saalt Period Underwear
- 70The Period Company The High Waisted Period (FlowStretch)-BLACK
- 70The Period Company The Thong Period (Sporty Stretch)
Which period underwear contains PFAS? Poor and Bad, we’d swap these
- Organic cotton with water-resistant coating
- The brand calls it PFAS-free, which we have not verified
- Water-resistant coating degradation and leaching
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton blend with water-resistant coating
- The brand calls it PFAS-free, which we have not verified
- Water-resistant coating chemistry (unstated)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton with water-resistant treatment
- The brand calls it PFAS-free, which we have not verified
- Undisclosed water-repellent treatment chemistry
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton with water-resistant treatment
- The brand calls it PFAS-free, which we have not verified
- Undisclosed water-resistant coating chemistry
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton with water-resistant finish
- The brand calls it PFAS-free, which we have not verified
- Water-repellent finish chemistry (unspecified)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend with water-resistant treatment
- The brand calls it PFAS-free, which we have not verified
- Water-resistant coating chemistry (unspecified)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton/nylon blend with waterproof coating
- The brand calls it PFAS-free, which we have not verified
- Waterproof coating degradation and leaching
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon- Cotton blend with water-resistant coating
- We found no PFAS statement from the brand
- PFAS
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Nylon, spandex, cotton blend with waterproof barrier layer
- PFAS
5 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton blend with waterproof coating
- We found no PFAS statement from the brand
- PFAS
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
Period Underwear
- Cotton/synthetic blend with waterproof coating (unspecified)
- We found no PFAS statement from the brand
- Formaldehyde / VOCs
5 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Bamboo viscose blend with waterproof treatment (coating unspecified)
- We found no PFAS statement from the brand
- PFAS
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
Bambody
Absorbent Period Panties Bamboo Rayon Leakproof Period Underwear for Women and Teens
- bamboo rayon with unspecified waterproof/leakproof coating
- We found no PFAS statement from the brand
- Waterproof coating chemistry (unknown composition)
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Organic cotton with waterproof/absorbent backing, unspecified treatment
- We found no PFAS statement from the brand
- Teflon-type coating/Teflon-family coating fume risk (from waterproof backing)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
Icon Underwear
Icon Intimates & Sleepwear Icon Undies Hi-Waist Period Underwear Panties Size Xs Beige (For Moderate Leaks)
- Cotton blend with water-resistant treatment (likely water-repellent coating finish)
- We found no PFAS statement from the brand
- Fluorocarbon-based water-resistant coating (water-repellent coating finish)
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton/synthetic blend with proprietary waterproof/leak-resistant coating (unspecified)
- Undisclosed waterproof coating chemistry (likely fluorinated or silicone polymer)
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton-polyester blend with waterproof treatment
- Fluorocarbon/Teflon-type coating in waterproof coating (undisclosed)
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Fabric with waterproof/leak-resistant coating (unspecified chemistry)
- Teflon-type coating or fluorochemical fume risk (if Teflon-type coating-based coating)
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- cotton blend with unspecified moisture/stain resistant coating
- We found no PFAS statement from the brand
- PFAS
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton with waterproof coating (unspecified)
- We found no PFAS statement from the brand
- Unspecified waterproof coating chemistry
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend with waterproof backing layer, composition unspecified
- We found no PFAS statement from the brand
- PFAS
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Nylon/spandex blend with waterproof coating
- We found no PFAS statement from the brand
- Undisclosed waterproof coating chemistry
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- organic cotton with waterproof barrier layer (unspecified)
- We found no PFAS statement from the brand
- Waterproof barrier composition (unknown polymer type)
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Organic cotton + polyurethane waterproof layer
- We found no PFAS statement from the brand
- Polyurethane coating degradation and leaching
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon- 25Thinx Cotton Starter Set Period Underwear
- 25Thinx Make The Switch Set Period Underwear
- 25Dear Kate Period Panties – Ada Hipster Full
- 25Thinx for All Women's Comfort Brief Leakproof Period Underwear
- 25Knix Medium-Flow Leakproof Period Underwear
- 25Proof Thinx Teens Bikini Leakproof Period Underwear - Black
- 25Saalt Leakproof Seamless Brief
- 25Saalt Leakproof Teen Period Underwear, Heavy Absorbency, Medium Size, Full Coverage
- 25Thinx Super Hiphugger Women Period Underwear
- 25Aisle Adjustable Absorbency Period Underwear with BOOSTER BOOST Brief Black / 1X
- 25Aisle Leakproof Low-Rise Period Underwear Essential Hipster Black / XXS
- 25Aisle Leakproof Period Underwear - Thong Style Essential Thong Black / XL
- 25Boyshort No Boundaries Boyshort Super Absorbency Period Underwear, 2-Pack, Womens Sizes Xs-xxl, Women's, Size: Small, Beige
- 25Boyshort Womens No Boundaries Boyshort Super Absorbency Period Underwear
- 25Chantelle Flux Abondant Period Proof Heavy Flow High Waist Brief Black - S / Black
- 25Hanes Comfort, Period. Women's Boxer Briefs Period Underwear Super Leaks 2-Pack
- 25 Seamless Period Pants That Actually Work
- 25Knix Light-Flow Period Underwear
- 25Icon Underwear Icon By Thinx Speax Bikini Women Ladies Underwear Bladder Moderate
- 25Knix Heavy Flow & Bladder Leak Protection Underwear
- 25Knix Heavy Flow & Bladder Leak Protection Underwear Superplus Leakproof No-Show High Rise
- 25Knix Leakproof Ultra Thin High Rise Brief
- 25Love Luna Women's Bikini Brief Period Panty
- 25Love Luna Period Midi Brief
- 25Saalt Amazon.com: saalt Reusable Period Underwear - Comfortable, Thin, and Keeps You Dry from All Leaks(Mesh Hipster, XX-Large
- 25Saalt Leak Proof Period Underwear High Absorbency - Super Soft Modal Comfort Briefs : Target
- 25Thinx (2 pack) Thinx for All Period Underwear for Women, Super Absorbency, Black, S-xl, Women's, Size: Small
- 25Thinx For All Period Underwear Size M - New Women | Color: Red/Brown
- 25Thinx Women Intimates & Sleepwear Thinx Hiphugger Period Black
- 25Bambody Absorbent Brief Super Comfy Period Underwear for Women
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