Sold by a licensed professional. ChromaID Bonding Color Masks offer low commitment solutions to color refreshing and increases the longevity of your hair coloring while keeping your hair healthy and soft. Depending on the application, shade selection, development time and hair structure, color can last up to 15 shampoos. The semi-permanent formula offers endless color opportunities without damage. The integrated Bonding Technologies provide intense care while the Low Salt Technology ensures enhanced color results via optimal pigment availability for a better color deposition. Use Bonding Color Masks evenly on pre-washed and towel-dried hair.