High precision brush to create a defined line as thin or thick as you wish its intense black formula lasts up to 16 hours and whats more it has a handy built in rubber tip is perfect for retouching any mistakes on the go say goodbye to smudges an intense perfectly accurate liner result that lasts up to 16hrs bourjois tip for the best result wait until your eyeliner dries before erasing with the rubber tip suitable for sensitive eyes and contact lens wearers ophthalmologi