A509-07 brush flat brush with soft bristles the brush 07 by purobio cosmetics has soft and round bristles. if it is used flat it is perfect for a uniform blending of eyeshadows, if used inclined it is excellent for a high definition of contours or for blending of eyeshadows and pencils. 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.