N. 01 The Small Shine & Care Hair Brush The Universal - Pale BlueMade from boar bristles, the Petite Brosse N. 01 is the ideal solution for fine hair that lacks density. The ultimate haircare brush, it adds vitality, shine and volume! Thanks to their multiple properties, the boar bristles of the Universal Hair Brush deeply nourish your hair. Since they are full of keratin, they provide your hair with natural hydration, drawing sebum from its roots and distributing it evenly throughout your hair.