Get the silky, shiny and healthy hair you've always wanted. HSI’s argan oil leave-in treatment is the product that pioneered oil-infused hair care and created the love for argan oil haircare products. Argan Oil Treatment can be used as a conditioning serum, styling and finishing tool. Infused with highly concentrated antioxidant-rich argan oil and shine—boosting vitamins, this completely transformative hair treatment detangles, speeds up drying time and boosts shine, leaving you with nourished, manageable and smooth hair with each use.