Stila Stay All Day Waterproof Brow Colour is an easy to use, waterproof brow defining pen.Give brows natural looking definition with this high performance Brow Colour. The specially designed brush tip allows for a precise and subtle application for a flawless look. Gliding on with ease, it never smudges or runs and stays put until you want it to be gone! Create perfectly groomed, beautiful brows with Stila’s Stay All Day Waterproof Brow Colour.