ProFlex Brush Heads - AquaSonic's improved ProFlex Brush heads offer improved plaque removal with precisely angled bristles with alternating hard and soft areas that are gentler on gums and slightly harder on teeth
Improved Plaque Removal - ProFlex brush heads offer 40% improved plaque removal when compared to standard brush heads
Only compatible with Duo Pro and not compatible with Duo
Enhanced Whitening - The whitening is 20% better with firmer bristles on the enamel, while the outer bristles are gentle on gums.