Craggy Serum Hair Serum is an amazing frizz free formula that instantly adds smoothness to your hair. It is an instant solution for dry, frizzy and damaged hair and a hair serum that will make your hair feel totally smooth .This deep smoothing serum has several ingredients . Hair serums are lightweight. They’re typically applied to damp or dry hair, focusing on the lengths and ends. Hair serum is adding shine and luster to the hair, giving it a healthy and polished look. Serums are specifically formulated for fine hair, while others target dryness, frizz, or color-treated hair. The serum helps maintain the style while providing the desired benefits.