I am someone who is always worried about having oily hair. I suspect there are many others with oily hair like me. Have you ever struggled with your hair becoming greasy by the time you get home from work after washing it in the morning? But buying expensive shampoos at Olive Young or department stores is a hassle for your wallet, so you must have been quite conflicted. The shampoo I am recommending is a large-capacity, cost-effective product that provides a refreshing cooling sensation as soon as you wash your hair and effectively controls oiliness from morning until late afternoon! The scent is also lovely with a minty fragrance, which makes it feel even more refreshing! Haha. I highly recommend this to hard-working office workers with oily hair..!! Since it comes in a large size and is frequently on buy-one-get-one-free promotion, you will be able to use it for a long time!