Beardo Boar Bristles Beard Brush is a premium Beard & Mustache Brush with firm grip and natural bristles for a smooth and frizz-free finish. Nylon brushes are ineffective at re-distributing sebum and when it comes to exfoliating it does more harm than good. The natural bristles of the Boar brush have enough stiffness to stimulate the skin beneath and smoothen flyaways thereby making the beard shaped and in place.