My eyebrows (specifically my left one) are the one area on my face that has caused me the greatest insecurity after a childhood chicken pox scar left a permanent, sparse patch toward the tail end of my brow. Over the years, I’ve gone through great lengths to conceal this, trying everything from expensive microblading and microshading sessions to brow lamination kits and countless pomades, pencils and powders. I recently purchased this one $10 miraculously performing brow pen that I came across on TikTok, and it’s finally achieved what years of products could not.

The L’Oréal Faux Brow pen is unlike pencils, gels or brow powders that kind of create just a generically filled-in look on brows, which works fine if you don’t have sparse brows or bald patches. Instead, the brow pen accurately mimics hair strokes, creating a very convincing effect that blends imperceptibly with your existing brow hairs — or creates a new brow altogether.

Individuals who have completely lost their brow hair, either through chemotherapy treatments, age or other conditions, have claimed to have been able to give themselves realistic-looking brows with the L’Oréal pen. In fact, the spokesperson for the Faux Brow campaign is Emmy Combs, a model with alopecia.