N.era brushes are manufactured out of a space-age filament, never seen yet in the dental industry. We are talking here of a polyamide like fiber which undergoes several special chemical treatments.
The properties (resilience, water absorbtion, stability at the tip) are equal or better than the highest quality of Kolinsky hair.
As soon as we talk about lifetime, N.era is far superior to Kolinsky as it lasts much longer.
Shock argument: when exposed to heat (steam jet, boiling distilled water), N.era fiber regenerates and extends its lifetime!
We wish you a lot of pleasure with N.era!