Lock in luster all week long. Your hair works hard for you all week and it's time to return the favor with Nu Skin ReNu Hair Mask. This deep conditioning treatment is formulated with key ingredients to provide critical hydration by penetrating the hair shaft and tripling the strength of damaged hair. Featuring CS7, an innovative cuticle smoothing agent that acts as cuticle glue to seal and strengthen each cuticle, this mask prevents split ends and breakage, making hair smooth, shiny, and manageable for up to seven days. When used weekly, Nu Skin ReNu Hair Mask is your secret weapon to visibly younger hair.