A503-01 brush brush with large and soft bristles. the brush n°01 by purobio cosmetics, with large and soft bristles, is perfect to apply powder on face and body. use it for powder, compact or brightening and other powders. how to use after use: after use: clean properly the brush with a mild detergent. for fluid products put a small quantity of product on the back of your hand to avoid waste and excess, dip the brush and apply.