Brow Boost thickens & fills out your brows & lashes. The deep conditioning treatment is formulated to strengthen & condition thin, over-plucked brows. The natural formula visibly enhances the appearance of brows in as little as 30 days. Having fuller brows can create a more youthful appearance & frame the face. To use: Apply at night with the convenient brush-on applicator & leave on overnight. The natural formula dries instantly.