Yari 100% Natural Snake Oil 250 ml Yari's 100% natural snake oil contributes to hair growth, making it thicker and longer while fighting hair loss and split ends. It can be used day and night on wet or dry hair. Yari's 100% natural snake oil is an excellent hair treatment that combines the benefits of all its components. It is the ultimate treatment for all hair types that strengthens, hydrates and leaves hair shiny. You will get the best results with regular use.