Liquid Keratin is the first safe at home alternative to expensive salon treatments providing amazing results of healthier, longer, softer, shinier hair with 100% less frizz without the use of Formaldehyde and other harmful chemical ingredients. One application can last up to 30 days.Starter set contains: 30-day Straight, Smooth, Strong & Long Treatment (4.2 fl. oz / 120 ml); Keratin Infusing Healthy Hair De-Frizz Shampoo (1.7 fl. oz / 50 ml); Keratin Infusing Deep De-Frizz Conditioner (1.7 fl. oz / 50 ml); Keratin Filling Leave-in Conditioner (1.7 fl. oz / 50 ml).