Brand from Japan: Kobayashi. 6 threads that can be taken firmly.Remove plaque one after another.Firmly removes food residue and plaque between teeth that cause tooth decay and periodontal disease.Plaque and food debris that accumulates between teeth and between teeth and gums are the cause of tooth decay, periodontal disease, and bad breath.Removes plaque and food debris that can only be removed by 40-50% with a toothbrush.How to use:Insert the floss while slowly moving it back and forth.Remove plaque by moving up and down along the side of the tooth.At the same time, gently massage your teeth.Use a pick to remove plaque and food residue that are difficult to remove on the back of your teeth.Insert the floss while slowly moving it back and forth.Remove plaque by moving up and down along the side of the tooth.At the same time, gently massage your teeth.Hard-to-remove plaque and food residue on the back of your teeth.Please take with a pick.