Guerlain Eyebrow Pencil Brun Ideal. The eyebrows are the key to defining personality and sophistication: they deserve a special pencil to shape facial expression. A blend of plant waxes and fruit derivatives produces the perfect balance between firmness and silkiness in a formula that ensures easy, precise and incredibly smooth application. Simply choose the shade that best matches your hair colour to create a look that is both sophisticated and natural. The pencil sharpener and the accessory that brushes, defines and softens the line make application accurate and help to blend colour.