Your favorite royal sister is NOW IN WATERPROOF! lash princess false lash waterproof gives you voluminous false lash effects of the original in a new waterproof formula! the conic shape fiber brush provides lashes with dramatic volume and sculpted length. opthalmologically tested. How to use: starting at the base of the lash line, wiggle wand back and forth, adding as many coats as you like until desired length and volume is achieved.