Parisienne BK Keep Serum Unopened, brand new. Parisienne Lash Lift Eyelash serum that strengthens and darkens eyelashes from the inside: Formulated with black keratin※1, it penetrates deep into the eyelashes. ※1 Hydrolyzed keratin (black wool) W treatment from the inside and outside of the hair: W treatment from the inside and outside of the hair with ingredients such as black keratin※1 and white keratin※2. Makes your eyelashes strong and beautiful from the core. ※1 Hydrolyzed keratin (black wool) ※2 Hydrolyzed keratin (wool) Sustained curl-keeping power: Also effective in maintaining curl-keeping power. By using it every day, you can have youthful and beautiful eyelashes forever. Fragrance you'll want to use every day: Marine floral An eyelash serum developed for salon professionals and users of eyelash extensions and lash lifts. Estimated usage period: With twice-daily use, morning and night, you can use it for about 4 months.