Antimicrobial Silver Technology* -99.9% of bacteria is eliminated from bristles within 6 hours after brushing due to our proprietary silver bristle technology. Flossing Bristles - long, soft bristles with 1 micrometer diameter tips reach areas missed by other toothbrushes. Our bristles reach deep into teeth grooves and the periodontal pockets (area between tooth and gum), while harder inner bristles ensure a complete cleaning Superior Quality - Our polyester bristles outlast traditional nylon bristles and our comfort grip makes for an enjoyable brushing experience.