Reviews | Expanding Gum Dental Floss - Oral Hygiene | The use of dental floss should be una an integral part of the daily routine, as the toothbrush alone removes only about half of all plaque.| The GUM® Expanding floss is thin and easy to insert, but una once inserted, thanks to contact with saliva, it expands becoming almost sponge-like.| This allows it to easily reach all spaces between the teeth, increasing the dental surface reached, and to clean below the gum margin.| | MAIN FEATURES Thin and easy to insert between teeth| Expands significantly for una more effective cleaning| Gentle on gums| Ideal for people with sensitive teeth and gums| | Package Format with 1 piece of 30m.