Now any brow is Unbelievabrow! L’Oreal Paris Unbelievabrow Longwear Brow Topcoat extends the wear of your favorite brow pencil for up to 30 hours. The Unbelievabrow Longwear Topcoat formula is quick-dry, waterproof, smudge-resistant and transfer-resistant. The ultra-precise applicator brush allows for a quick and easy application process that leaves your brows sealed for up to 30 hours. Shake well before use.