Oral-B Criss Cross Gum Care Indicator Toothbrush is designed to provide effective plaque removal and gum care for your teeth and gums. It features unique Criss Cross bristles and a Gum Care Indicator system to help you achieve a cleaner and healthier mouth. Criss Cross Bristles: The toothbrush has Criss Cross bristles with a unique design that forms an X-shape. These bristles are angled and arranged in a way that helps lift and remove plaque effectively from hard-to-reach areas between teeth and along the gumline. Gum Care Indicator: The toothbrush is equipped with a Gum Care Indicator system, which typically features blue indicator bristles that fade over time with use. The blue bristles gradually fade as the toothbrush wears out, signaling when it's time to replace the toothbrush. Regular replacement ensures optimal cleaning performance and gum care. Soft or Medium Bristles: The toothbrush may come in soft or medium bristle variants, allowing users to choose the level of firmness that suits their preference and oral care needs.