Ardell Brow Defining Powder Eyebrow Powder Ardells Defining Powder is a powder that you brush on your eyebrows to get the color and highlight your eyebrows. The concentrated color allows you to create the perfect eyebrow shape and is easily applied with the included oblique cut brush. Application: With short, light sweeping strokes, apply powder, start at the eyebrow at the corner of his eye and follow your natural shape. Extend the whetstone if necessary. Ideal for use with Ardell Brow Perfection Stencils (eyebrow template).