Expands Gently Between Teeth. Stretches to Fit Interproximal Spaces. 50 Meters Waxed. Beauty Formulas Active Expanding Mint with Fluoride is an active innovate expanding floss that expands gently between the teeth and stretches to fit inter-proximal spaces. Usage Instructions: Place the floss between the teeth, sliding it up & down against the tooth to clean the gum line. Stretch a little bit to cleanse between teeth properly. Ideal for - Beauty Formulas Active Expanding Mint with Fluoride help cleanse teeth perfectly that too in a gentle manner. They are ideal for all of you to maintain oral hygiene.