The obvious question: if it's that soft, how does it clean?
Density. The Nano Toothbrush Pro head has over 10,000 ultra-fine bristles versus ~500–800 on a standard electric brush. More surface contact per pass, not less. A clinical trial confirmed ultra-soft brushes achieve plaque reduction comparable to standard brushes with dramatically less tissue trauma.
The motor uses gentle sonic vibration not oscillating rotation. You get the cleaning power. You lose the damage. And because the bristles are so fine, the contact massages rather than abrades stimulating circulation, letting damaged tissue finally recover.