Brand from Japan: Skincotton. Recommended for those who have been troubled by stubborn hair wavyness, those who want to try a full-fledged acid heat treatment at home, and those who want to care for beautiful straight hair.Contains a high concentration of glyoxylic acid, a salon-level component that repairs wavy hair, to achieve beautiful straight hair.This hair mask contains a high concentration of luxurious beauty ingredients such as collagen, silk, and keratin, processed under high pressure.How to use:After shampooing, lightly drain water and apply an appropriate amount, focusing on areas where hair swell is a problem, then leave for a while and rinse well.Leave it for 3 minutes after application to feel the results more easily.After that, use your favorite treatment as usual to protect the surface of your hair.After towel drying, apply heat from a hair dryer or straightening iron to further condition hair to a shiny, straight hair.Use 2 to 3 times a week.