What it is: A waterproof, superfine-tipped pen ideal for creating realistic hair-strokes that will give you your most natural-looking brows yet.Ingredient Callouts: Free of parabens, phthalates, mineral oil. This product is also vegan, cruelty-free, and gluten-free.What Else You Need to Know: Use the sharp, flexible brush tip to easily build dimension by micro-stroking in areas you want more fullness, creating unparalleled hair-like detail with precision. The waterproof formula glides on effortlessly with a featherlight feel and mimics natural hair.