The Hi Brow Smoothing Wax Pencil is an essential product for creating perfect, high definition brows. The wax pencil can be used in two ways. It can be applied directly onto the brow before using the 24hr brow powder. This will make the powder stick and reduce any smudging or wear off during the day. The wax pencil can also be applied on top of the powder which will make it waterproof all day long.