Jena Keratin Hair Straightening Serum Argan Oil and Keratin Jena Keratin & Argan Oil Straight Lock Shine Boost Hair Serum for long-term styling and protection of hair from heat treatment, moisturizing and shine. Good for dry and damaged hair. It forms a protective keratin layer along the entire length of the hair, to the very ends. Volume: 250 ml Tags: mask, hair