Radius Vegan Sponge Floss, Peppermint
Reader ratings
Plain woven nylon floss with plant waxes and named flavor oils, about $5 a spool. It had no detectable organic fluorine in a consumer lab screen (added 2024). It is nylon, so not plastic-free, and the plaque claim is untested here.
Best for People who want a PFAS-free floss that is not silk, for tight teeth or silk that shreds, at a low price.
- Our quality rating
- Good (4 of 5)
- Price range
- Budget
- Size
- 55 yards (50 m), a three-month supply by the maker’s count; six for about $28.50
- Made in
- Made in the USA (maker)
approx. $5 for 55 yards
See it on Radius’s site →We are not affiliated with Radius. This link goes to the maker’s own page, with no tracking code. How we're funded.
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How we evaluated it
Why we chose it What put it on our list
- The page names every ingredient: soft woven nylon, coated with organic coconut oil and organic carnauba wax, plus organic erythritol, organic tea tree oil and organic peppermint oil. That is the plain-nylon, plant-wax recipe the category asks for.
- Mamavation and Environmental Health News added Radius Sponge Floss Peppermint with Coconut Oil, which we take to be this product under an older name, to their floss lab screen in an August 2024 update. It had no detectable organic fluorine. Oral-B Glide Pro-Health in the same screen measured 248,900 ppm.
- The maker says the floss is free of PFAS, PTFE, artificial sweeteners, dyes and preservatives.
- It costs about $5 for 55 yards, or $4.50 on subscription. The maker calls the eco-carton dispenser plastic-free and 100% recyclable.
Trade-offs What to weigh before you buy
- Nylon is a petroleum-based plastic. If you want a floss with no plastic at all, choose silk, such as Dental Lace.
- “Shred resistant” and “clinically proven to remove more plaque than tape floss” are the maker’s words. We could not see the study.
- The lab result is one sample in a screen for total organic fluorine, tested under the older product name. We assumed the formula is unchanged.
- B Lab’s directory lists Radius as a Certified B Corporation since May 2023. We could not check the maker’s PETA mark. The site header says “ADA Accepted,” but we found no Radius floss in the ADA’s product search.
What to know Details worth knowing first
Many waxed “glide” flosses use PTFE, a PFAS, and a 2019 study linked flossing with one such floss to higher blood levels of some PFAS. Our guide to avoiding PFAS has the background. Radius Vegan Sponge Floss is the closest match here to what our oral-care criteria ask for: nylon, not PTFE, with coconut oil and carnauba wax and every flavor named.
An outside check agrees. In a consumer lab screen updated in 2024, a Radius sponge floss with the same description had no detectable organic fluorine. The woven fibers expand when wet, which some people find easier than flat tape on tight teeth, though the plaque claim on the page is the maker’s.
It is still nylon. If avoiding plastic matters most to you, silk is the alternative, with the trade-offs on the Dental Lace page. B Lab’s directory confirms the B Corp mark, which is about the company. The PETA mark, which we could not open, stays the maker’s claim.
Quality & testing How it measures up against our checklist
- Third-party tested
- Yes
- Tested by
- Mamavation and Environmental Health News (EPA-certified lab, name not given)
| What we checked | What we found |
|---|---|
| PFAS-free floss Verified | Plain woven nylon with plant waxes. No detectable organic fluorine in one sample in Mamavation’s screen (added in an August 2024 update), and the maker says PFAS-free and PTFE-free. |
| Every ingredient listed Maker’s claim | Floss, coating, sweetener, tea tree oil and the peppermint flavor are all named on the page. |
| Honest claims Not verified | The page says the sponge design is “clinically proven to remove more plaque than tape floss.” It does not name the study, and we found none for this floss. |
| Certified B Corporation Verified | B Lab’s directory lists RADIUS as a Certified B Corporation since May 2023. This is a company-level certification, not a product test. |
| PETA vegan and “ADA Accepted” marks Not verified | The page claims both. We could not check PETA’s listing, and the ADA’s search did not show a Radius floss. |
What the labels mean
- Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
- Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
- Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.
Sources Where our facts come from
- Radius Vegan Sponge Floss: product page. Maker’s page. Ingredients, free-from list, price and flavor oils. Open ↗
- Mamavation and Environmental Health News: 39 dental floss products screened for organic fluorine (first published September 2022; products added August 2024). Test report. An EPA-certified lab, one sample per product, total organic fluorine only. Mamavation is an advocacy outlet with affiliate links. The tested name was “Radius Sponge Floss Peppermint with Coconut Oil,” added in an August 2024 update (it is not in the September 2022 version); we take it to be this product. Open ↗
- B Lab directory: RADIUS. Certifier or regulator listing. Lists Radius as a Certified B Corporation since May 2023. Open ↗
- Boronow et al. 2019: serum PFAS and exposure-related behaviors, including flossing with Oral-B Glide. Independent source. Why PTFE floss matters: 178 women, with higher levels of some PFAS among Glide users. Open ↗
Alternatives Other options to compare
- Dental Lace silk floss No plastic in the floss, but silk can shred on tight teeth and its PFAS-free claim has no lab result.
- Cocofloss A woven polyester floss with a clean result in Mamavation’s lab screen, about $10.