Isadora Flex Tip Eyeliner is an ultra-flexible eyeliner. The long, flexible felt tip makes application quick and easy and ensures the right glide and adherence. To change the thickness of the line, simply increase the pressure slightly. The water-based formula is highly pigmented, water-resistant, long-lasting and smudge-proof. Without a doubt, one of the easiest eyeliners to apply and a timeless classic from Isadora.