Thin dental floss, easy to slide even into very tight spaces. Swells with moisture during use to clean larger surfaces. Perfect for sensitive teeth, gentle on gums. Flossing should be an essential part of your daily routine as brushing alone only removes half of all plaque. Expanding Floss is thin and easy to insert into the space between the teeth. After insertion, the thread expands significantly. This makes it easy to fit all spaces between the teeth, reach more of the tooth surface and clean below the gumline.