• Dental lace refillable floss set including a glass bottle with a blue label and silver cap, a green and white hanging card, a white box labeled Silk Floss, and two beige silk thread spools on a white background.
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Refillable Silk Dental Floss, PFAS-Free, Glass Container – Dental Lace

Refillable Silk Dental Floss, PFAS-Free, Glass Container – Dental Lace

The Smoothest-Gliding Natural Floss

If you have tried an eco floss and found it shredded or caught between tight teeth, this is the one that fixes that.

Dental Lace is made from 100% mulberry silk, a genuinely natural fiber that glides smoothly and gently between even close contacts, coated with plant-based candelilla wax rather than the PFAS "forever chemicals" that give conventional floss its slip. It comes in a refillable glass container with a stainless steel cutter and cap, and you refill it with fresh silk spools rather than buying a new plastic case each time. It is PFAS-free and PTFE-free, free of parabens and SLS, lightly flavored with mint essential oil, and its packaging is compostable and printed with soy inks.

What sets it apart in this aisle is the credentials behind it. Dental Lace is a Certified B Corporation and this floss is USDA Certified BioBased, two genuine third-party validations rather than self-applied "eco" labels, which is exactly the kind of independent proof we weight most heavily. It is also America's first refillable floss brand, with a long track record behind it.

The Honest Notes

The honest tradeoff here is the same one we flag on our boar-bristle brush: silk is an animal product.

1. It is made from mulberry silkworms, so this floss is not vegan, even though its wax coating is. 

2. We carry it because it is the best-gliding natural floss and the most independently credentialed one, but if vegan matters to you, our bamboo-charcoal and corn-based flosses are the plant-based options, each honestly a little more prone to catching on very tight teeth than silk. 

3. Two smaller notes: even silk can occasionally break if you work the same spot hard against an extremely tight contact, though it glides better than most, and the glass container, while lovely, is breakable in a way a steel dispenser is not, so it is worth a careful home rather than a gym bag. 

4. It is scented with mint essential oil, so it is not fragrance-free.

True Shift Score: 8.8 / 10

This is our own assessment, not a lab result or a certification.

It scores at the top of our floss options for a clear, evidence-based reason: it is a genuinely natural silk fiber that glides better than any plant-based floss we carry, it is PFAS-free and PTFE-free, it refills to cut plastic, and it is backed by real third-party credentials, a Certified B Corporation making a USDA Certified BioBased product, which is exactly the independent proof we value most. It stops just short of the very top for honest reasons rather than faults: silk is an animal product, so it is not vegan, and the glass container is more fragile than a steel one. For the smoothest-gliding, best-credentialed natural floss, it is an excellent choice.

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Building the Routine

Floss first, then rinse, then brush.

Browse the Non-Toxic Hair & Oral Care collection for more.

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How We Evaluate Hair & Oral Care

We read the ingredient list rather than the claims on the front of the pack.

1. For oral care, we favor gentle, effective formulas, we are honest about the fluoride question rather than fear-marketing it, and we give real weight to durability and to formats that cut plastic.

2. We separate what is independently certified from what a brand simply states, and we tell you which it is.

3. And we are honest about tradeoffs, including when the best-performing option is not the vegan one.

4. The shift here is choosing transparent, gentle, low-waste choices over marketing.

Related Reading and Collections

To weigh other options, browse the Non-Toxic Hair & Oral Care collection, or explore related aisles in Phthalate-Free Skin Care & Soap and Non-Toxic Personal Body Essentials. Step back to the Non-Toxic Bath & Body hub for everything else. If you would like to work through your whole home step by step, our DIY Healthy Home Guidebooks are a practical place to start.

Common Questions About Dental Lace Silk Floss

Is silk floss vegan?

No. It is made from mulberry silk, an animal-derived fiber, so this floss is not vegan, though its candelilla wax coating is plant-based. We carry it because it glides better than any plant floss and carries the strongest independent credentials. If you need a vegan floss, our bamboo-charcoal and corn-based options are the plant-based picks.

Will it shred on tight teeth like some eco flosses?

Much less. Silk is smoother and stronger than bamboo-fiber or corn-based floss, so it is the best pick for tight contacts. Even so, working the same spot very hard against an extremely tight gap can break any natural floss, so ease it through gently.

What do "B Corp" and "USDA Certified BioBased" actually mean?

They are independent, third-party certifications. B Corporation status verifies the company meets audited standards for social and environmental performance, and USDA Certified BioBased confirms the product is made from a verified proportion of renewable, plant-based content. Together they are real outside proof rather than self-applied eco labels, which is why this floss scores as high as it does.

About This Product

This item is fulfilled through Amazon, which handles pricing, availability, and shipping. The True Shift earns a commission on qualifying purchases, and that is what keeps this work independent and reader-supported rather than funded by the brands being reviewed.

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Take the Shift Further

I am Vipul, and I spent years auditing the materials and chemicals that come into our homes. I built this space to provide honest, expert-backed reviews of the products you use every day, with the reasoning shown rather than hidden behind a score. The work stays independent because it is supported directly by readers rather than by the brands being reviewed.If you want to support that work, you get access to ongoing research, deep-dive chemical notes, non-toxic living tips, and new product reviews as they are finished. Find us on Substack and Patreon:

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