I tried Pyunkang Yul Essence Toner for ONE WEEK!! (its not what you think it is...) - YouTube
Pyunkang Yul Essence Toner | Skinsider UK
Amazon.com: Pyunkang Yul Facial Essence Toner 6.8 Fl. Oz- Korean Moisturizer/Toner for Dry and Combination Skin Types - Astringent for Face Certified as a Zero-Irritation - Condensed Texture : Everything Else