MÜHLE offers shaving brushes with two types of synthetic hair: Silvertip Fibre® and Black Fibre. Silvertip Fibre® is MÜHLE in-house patented synthetic fibre brush. Silvertip Fibre® provides an extremely soft feel to the skin. Moreover, they deliver a very firm tensile strength. In another words, they provide more backbone for a massaging effect when lathering up. The particularly low-maintenance fibres are suitable for vegans.