1. Best for outlining your brows: Chantecaille - Waterproof Brow Definer in Light Taupe
What it does: This waterproof dual-ended brow definer has a grooming brush on one end and a triangular tip on the other.
What we think: After lining and filling out the brows with the precise application of the angled tip, we smoothed out our brows with the grooming and couldn't stop combing through them—the brush is unbelievably soft. Easy to apply and outline, this definer is great if you're looking for an easy and quick application.