Natural flavor for a vibrant fresh feeling Gluten-free. PTFE-free. BPA-free. Expands into inter-dental spaces for super cleansing Made of simple polyester fibers. More surface area for superior cleaning Lightly waxed with a natural blend of vegetable and bees wax (no petrochemical wax) BIODEGRADABLE container, made with EcoPure, will biodegrade faster in a landfill than regular plastic (which can take up to 100 years) EXPANDING: Smart Floss is an expanding waxed dental floss that was designed to get into those hard-to-reach spaces. It stretches and expands to clean your teeth better by a clinically proven 55%! SUITABLE FOR EVERYONE: This is a dental floss for kids and adults. It works like any woven floss and can easily clean in small spaces, wide spaces, and even with braces. VIBRANT FRESH FEELING: This adult and kids floss is naturally flavored with cardamom, leaving you with the pleasant feeling of a freshly clean mouth. GENTLER ON GUMS: Unlike those other flosses with no spring that can often hurt gums and fingers, this revolutionary floss is much gentler on gums because it is cushion-soft and can stretch. FREE OF ALLERGENS: DrTung's Smart Floss is naturally free of allergens like gluten. This woven dental floss is free of BPA, PTFE, and petrochemical wax.