Thin woven floss infused with nano Hydroxyapatite (nHA) to help support enamel remineralization. Perfect for a deeper clean with added oral health benefits. Reusable & long-lasting: Each floss head lasts ~1 week with daily use Compatible: All floss heads fit all Slate flosser models 3-in-1 Design: Non-toxic woven floss, silicone gum brushes, and triple-row tongue scraper Toxin-free: No PTFE, PFAS, waxes, or coatings