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.