NYLON BRISTLES in an ECO BRUSH, REALLY?
Yes, and there's one big reason why; Humble Brush has to work well as a toothbrush. After extensive testing and prototypes, using a more degradeable nylon was the only answer. All our products therefore use Nylon 6 which degrades faster than lower grades of nylon. The bristles are varied by thickness to provide options for Soft (adult), Medium (Adult - UK Only) and Ultra-soft (kids). Our bristles have been verified to be free from the toxin BPA (Bisphenol A). Nylon 6 is a material ideally suited for dentistry but also degrades over time and can be processsed through regular waste channels. Importantly, there is no other plant-based material that would allow to use your brush for the recommended three months.
Bristles from DuPont are made from Nylon 6. Each bristle is between 0.12-0.25mm thick - the thicker the bristle, the stiffer the brush head.