The wow what a brow pen waterproof is an absolute must-have for long-lasting, top-styled brows. The mine never needs to be sharpened and has a water drop-like tip – perfect for tracing individual brow hairs and visibly filling in the brows. The integrated brush can also be used to comb the brows into shape. Best of all, the waterproof texture ensures a long-lasting wow brow look – every day.