Oral-B Ultra Thin toothbrush is uniquely engineered for exceptional plaque removal while being gentle on gums. Oral-B bristles, angled at 15°,, has been clinically proven to remove up to 90% more plaque than a regular manual toothbrush. Ultrathin bristles have up to 20x thinner bristle tips that stay soft on gums and have 2x deeper reach between teeth vs regular bristles. Extra-long Power Tip bristles hit areas where plaque builds up, and bristles flex and straighten to get in-between teeth while still being gentle on your gums.