Our Dental Floss Picks contains Polypropylene. It can help remove food debris from between your teeth and avoid damaging your gums. The method of using it is very simple: take out the floss pick, hold the handle of the pick, gently slide the floss stick into the gap between the two teeth, and move the floss stick back and forth between the teeth to help remove food debris and plaque. After using the floss, please discard the floss and rinse your mouth with water. It can effectively remove food debris between teeth, and dental floss is soft, smooth and resistant to breaking.