A sustainable OUAI to fill up on our concentrated ACV shampoo. Product details Can’t remember the last time you washed your hair? Get a really good clean with this concentrated apple cider vinegar shampoo that deeply cleanses hair and scalp without stripping. Use it once a week in place of your regular shampoo to remove buildup from products and hard water deposits while restoring natural volume and shine. Bonus: It smells like our sophisticated rose fragrance Melrose Place. Keep it on deck 24/7 with this Refill Pouch, made with 60% less plastic than bottles. Because climate change is real.