This advice is aftercare procedures to ensure the longevity of their extensions, and this information is also gained through professional training. The Importance of Eyelash Extensions TrainingProfessional training for eyelash extensions is non-negotiable. This well-established beauty training school offers an exceptional eyelash extensions training program. At MaiLash & Brows, the eyelash extensions training program is comprehensive and up-to-date. The training covers all the fundamentals of eyelash extensions, from understanding the different types of extensions and their application methods to mastering the unique MaiLash Classic and Hybrid techniques.