Keratin Complex EBO Express Blow Out Smoothing System Pre-Treatment Shampoo Treatment Multi-Benefit Spray 4oz-Kit 28 Ounce 828 Milliliters -This unique express smoothing service gives your hair the super-charge of keratin your hair needs in just one hour, with results that last up to 6 weeks! Its the go-to hair smoothing treatment for those new to keratin.