Radius Vegan Sponge Floss, Peppermint

Woven nylon floss with organic coconut oil and carnauba wax and named flavor oils, at about $0.09 a yard. No detectable organic fluorine in a consumer lab screen (2024). It is nylon, so not plastic-free, and the plaque claim is untested.

Best for People who want a low-priced PFAS-screened floss that is not silk, for tight teeth or silk that shreds.

Our rating: Good (3.5 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 → (opens in a new tab)

We are not affiliated with Radius. This link goes to the maker’s own page, with no tracking code. How we're funded.

Also sold at Amazon ($4.81), Vitacost ($4.81), iHerb ($4.81) .

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How we evaluated it

How it scores Our rating, metric by metric Good, 3.5 of 5

Ingredients 40% of the rating 3 of 5

Six named ingredients with no dyes, artificial sweeteners or preservatives and plant-based oils and wax, but the fiber is nylon, a petroleum plastic, where silk is the natural choice.
Active ingredient 20% of the rating 3 of 5

The page says the sponge design is “clinically proven” to remove more plaque than tape floss but names no study, and a 2019 Cochrane review found only low-certainty evidence that any floss helps.
Independent testing 15% of the rating 4 of 5

A consumer lab screen of 39 flosses found no detectable organic fluorine in Radius Sponge Floss Peppermint, one sample under an older product name, for total fluorine only.
Trust 10% of the rating 3 of 5

It is a certified B Corporation, but the site header says “ADA Accepted”, we found no Radius floss in the ADA’s product search, and it runs a commission affiliate program.
Value 15% of the rating 5 of 5

About $0.09 a yard ($5 for 55 yards), the lowest of the flosses here that is not a pick.

The rating, 3.5 of 5, is the weighted average of these scores. See how we rank oral care and our standard.

Where to buy Stores and the prices we saw 3 stores

Amazon (opens in a new tab) approx. $4.81. The 55 yd Peppermint spool, one pack, sold and shipped by Amazon itself, not by Radius. Three were left in stock on 2026-10-23.
Vitacost (opens in a new tab) approx. $4.81. Listed under the older name “Sponge Floss, Peppermint, 55 yds (50 m)”, in stock on 2026-10-23, with the same six ingredients as Radius’s page.
iHerb (opens in a new tab) approx. $4.81. Listed under the older name “Sponge Floss, Peppermint, 55 yds (50 m)”; $4.81 one-time on 2026-10-23 ($4.33 with a subscription), in stock.

Prices as we saw them on October 23, 2026. They change often. These links carry no tracking code and earn us nothing.

What’s in it Every ingredient, in label order 6 ingredients

Soft woven nylon
Organic coconut oil
Organic carnauba wax
Organic erythritol
Organic tea tree oil
Organic peppermint oil

Who tested it What each test found, and who paid for it 2 tests

Independent Mamavation and Environmental Health News (the site earns affiliate income) August 2024

Radius Sponge Floss Peppermint with Coconut Oil, which we take to be this product under an older name, had no detectable organic fluorine, a PFAS marker, in one sample at an EPA-certified lab. Oral-B Glide Pro-Health in the same screen measured 248,900 ppm. Open ↗ (opens in a new tab)
Maker’s own test Radius (statement on its product page)

Says the floss is free of PFAS, PTFE, phthalates, parabens, artificial sweeteners, dyes and preservatives. No test report is published. Open ↗ (opens in a new tab)

Who paid, and why it matters

Independent The tester took no money from the maker for it: a consumer group, a journalist, a university or a regulator.
Paid certification An outside lab or certifier tested or listed it, and the maker paid for that.
Maker’s own test A lab report or certificate of analysis the maker commissioned and published.

A certification is a floor, not a verdict: it checks what its program checks and nothing else. We weigh tests by someone with no stake in the result most.

What people ask Worries raised online and elsewhere, and what we found 5 questions

Is nylon floss a plastic and does it shed microplastics?: It is nylon, a petroleum-based plastic, so it is not a plastic-free floss. We found no study of how much this floss sheds. Our guide to reducing microplastics covers the wider question; silk, such as Dental Lace, avoids it.
Is it really PFAS-free?: The maker says so, and Mamavation’s screen (opens in a new tab) found none in one sample, added in an August 2024 update under a slightly different product name. It tested for total organic fluorine and not for named PFAS. We found no Prop 65 notice or lawsuit naming Radius.
Is it “ADA Accepted” and “clinically proven”?: The site header says “ADA Accepted” and the page says the sponge design is “clinically proven to remove more plaque than tape floss”. We found no Radius floss in the American Dental Association’s product search and no study named for the plaque claim, so both stay unverified. The 2019 Cochrane review (opens in a new tab) of 35 trials found floss with brushing may reduce gingivitis, with low-certainty evidence.
Are the erythritol and “organic flavors” a worry?: The coating includes organic erythritol, a sugar alcohol. A 2023 study (opens in a new tab) linked high blood erythritol from the diet to heart attack and stroke risk. The amount on a floss coating is tiny and is not swallowed, and we found no study of floss. The flavor comes from named organic oils.
Are the influencers who recommend it paid?: Some may be. Radius’s affiliate page (opens in a new tab) offers “a competitive commission (up to 15-30%)” on sales made with an affiliate’s code. We found no list of who is paid, and could not read Reddit or social media.

Why we chose it What put it on our list 4 points

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.
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 August 2024. It had no detectable organic fluorine.
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, and the maker calls the eco-carton dispenser plastic-free and 100% recyclable.

Trade-offs What to weigh before you buy 4 points

Nylon is a petroleum-based plastic. If you want a floss with no plastic at all, choose silk, such as Dental Lace.
“Shred resistant”, “clinically proven” and “ADA Accepted” are the maker’s words. We could not see the study or an ADA listing.
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, which is about the company and not the floss. We could not check the maker’s PETA mark.

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 from a non-silk floss: 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. The “ADA Accepted” line on the site and the PETA mark stay the maker’s claims, because we could not find either in the listings.

What we checked Each claim, and how sure we are of it 5 checks

How Radius Vegan Sponge Floss, Peppermint measures up against our oral care criteria
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, as we found on 2026-10-22. 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 11 sources

Radius Vegan Sponge Floss: product page. Maker’s page. Ingredients, free-from list, price and flavor oils, seen 2026-10-23. Open ↗ (opens in a new tab)
Amazon: Radius Vegan Sponge Floss, Peppermint, 50 m / 55 yd, pack of 1. Independent source. $4.81 on 2026-10-23, sold and shipped by Amazon.com. Open ↗ (opens in a new tab)
Vitacost: Radius Sponge Floss, Peppermint, 55 yds (50 m). Independent source. $4.81 and in stock on 2026-10-23. Lists nylon, virgin coconut oil, carnauba wax, peppermint oil, tea tree oil and erythritol, and UPC 085178001868 (Amazon’s newer Vegan Sponge Floss listing has UPC 085178013045). Open ↗ (opens in a new tab)
iHerb: Radius Sponge Floss, Peppermint, 55 yds (50 m). Independent source. $4.81 one-time purchase and $4.33 with a subscription on 2026-10-23, in stock; UPC 085178001868. Open ↗ (opens in a new tab)
Radius: collab and affiliate program. Maker’s page. Offers a commission of up to 15 to 30% on sales made with an affiliate’s code. Open ↗ (opens in a new tab)
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 ↗ (opens in a new tab)
B Lab directory: RADIUS. Certifier or regulator listing. Lists Radius as a Certified B Corporation since May 2023. Open ↗ (opens in a new tab)
California Attorney General: Proposition 65 60-day notice search (Radius). Certifier or regulator listing. No notice naming the floss maker found on 2026-10-23. Open ↗ (opens in a new tab)
Worthington et al. 2019: home use of interdental cleaning devices in addition to toothbrushing (Cochrane review). Independent source. 35 trials, 3,929 adults. Floss or interdental brushes with brushing may reduce gingivitis or plaque, with low to very low certainty; interdental brushes may do better than floss. Open ↗ (opens in a new tab)
Witkowski et al. 2023: the artificial sweetener erythritol and cardiovascular event risk (Nature Medicine). Independent source. About dietary exposure, not floss. Open ↗ (opens in a new tab)
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 ↗ (opens in a new tab)

Alternatives Other options to compare 2 options

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.
etee Peppermint Mulberry Silk Floss Silk with candelilla wax in a glass jar, with no detectable organic fluorine in the same screen. About $12 with two spools.

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