Keune Care Keratin Smoothing Mask is a luxurious treatment that enriches the hair with keratin and keravis, works wonders on damaged, dry or normal hair to create silky smooth, healthy hair. After diligent use, your hair is left silky smooth, stronger, healthier and easier to manage. How? Keratin! This fibrous protein is like your hair’s building block. It diminishes when your hair is damaged, and keratin loss makes hair extra vulnerable. Keratin Smooth products restore the hair and replenish keratin by injecting it into the outside of the strands as well as deep inside it.