Butler Gum Dental Floss Waxed 1555 is a shred-resistant dental floss that reaches between the teeth and under the gum line. Between-teeth cleaning is recommended by dentists and dental hygienists to remove the dental plaque that toothbrushes alone cannot reach between the teeth. Dental floss has been evaluated by dentists in clinical studies and is scientifically proven to reduce gingivitis and bleeding. It is particularly helpful in situations where the fibers of normal floss shred in tight spaces between the teeth and over rough surfaces of teeth or dental restorations.