Listerine Ultraclean dental floss stretches and flexes, sliding easily between teeth for hassle-free cleaning. This tough, shred-resistant dental floss uses Micro-Grooves technology to remove plaque keeping your mouth healthy. Flossing removes plaque on teeth that brushing may miss and is an important step in your oral care routine. Listerine Ultraclean dental floss delivers a burst of mint flavor for a fresh clean. It does not contain mouth rinse ingredients.