Help to address thinning, patchy and over-tweezed browns with Obagi Nu-Cil Eyebrow Boosting Serum, a eyebrow boosting serum formulated with keratin and lipid compounds to help with creating fuller-looking, thicker eyebrows. Infused with Sodium Hyaluronate and Panthenol, this serum helps to retain water, while also helping to maintain moisture condition and texture improvements. Designed for targeted application, the spoolie is designed with bristles to help evenly and efficiently application.