Introducing Stila Stay All Day Waterproof Brow Colour. An easy-to-use, waterproof brow colour that stays on all day. With a specially-designed brush tip, Stila Stay All Day Waterproof Brow Colour leaves your brows looking naturally defined. The formula glides on with ease; won\'t smudge or run, and stays in place until you say when. Key benefits of Stila Stay All Day Waterproof Brow Colour: - Easy-to-use, waterproof brow colour that will stay on all day. - For natural looking and defined brows. - Water-resistant and easy-to-apply. - Unique formulation mimics your brow.