CrossAction bristles are designed to support the brushing habits of most people who tend to use a back-and-forth motion. Angled in opposing directions, these bristles flex and then straighten, actively penetrating between teeth—where plaque builds up easily—and along the gumline to lift plaque out and sweep it away. Oral-B CrossAction Compact toothbrush unites Oral-B's Best cleaning technology and a professionally inspired compact head. Provides up to 100% better reach in tight spaces versus a regular brush and easy reach to back teeth and maneuverability around the mouth. Trust Oral-B, #1 Dentist-recommended toothbrush brand worldwide.