ORIGINAL ORIGINAL Keratin Complex Natural Keratin Smoothing Treatment (NKST) System, 32 Fl Oz x 2 NKST (Natural Keratin Smoothing Treatment) is a multi-award-winning keratin treatment that penetrates the cuticle to reduce frizz and curl, making the hair stronger, smoother and healthier for up to 5 months. This revolutionary smoothing treatment is powered by Signature Keratin to help repair damage, eliminate frizz, cut styling time and deliver a soft, smooth and shiny finish. What It Does • Blocks humidity and eliminates frizz. • Formulated with our Signature Keratin for stronger, healthier hair. • Instantly repairs damage. • Increases manageability. • Delivers luminous shine. • Dramatically reduces blow-dry time. • Enhances color vibrancy. • Cumulative results. • Results last up to 5 months. • Voted behindthechair.com’s “Favorite Chemical Smoothing Service” 9 years in a row. • Winner of the Beauty Launchpad 2019 and 2020 Readers Choice Award for “Favorite Smoothing Service”. What Else You Need to Know Kit Includes: • 1 - Keratin Pre-Treatment Shampoo 33 oz. • 1 - Natural Keratin Smoothing Treatment 33 oz.. *Totaling 66 fl. oz. *Winner of Beauty Launchpad's Favorite Smoothing Treatment , 9-time award-winner of Behindthechair.com Stylist Choice Award for Favorite Chemical Smoothing Service