Flossing is an integral part of any thorough oral care regimen, but not all flosses are created equal. Our Natural Biodegradable Silk Floss takes us back to a time before the nylon of todayâs floss took over â when floss was made of pure, inviting, luxurious silk. Free from the toxins found in similar products, RADIUSâ silk floss glides easily between teeth for a meticulously clean finish. Plus, our silk floss is the only biodegradable and compostable floss on the market today.