Welcome to PREP, the first-of-its-kind hair studio in San Francisco for kids ages 2 - 18. When it comes to hair care, teens and tweens have two options: kiddie shampoo or adult product. There is nothing for that in between stage, when hair is changing the most, until now... PREP hair care is a full line of paraben-free shampoos, conditioners, and styling products especially formulated for teen and tween hair. Say goodbye to bad hair days! Your PREP package includes the best for you: In a Flash Shampoo and Conditioner, and our amazing Iconoclast Pomade. This great package also includes a (short) haircut for your 2 - 18 year old at our Sacramento Street location.