Deep Protect Density Mask leaves hair conditioned, manageable and smooth. This professional thinning hair treatment is a density-protection treatment that provides an up to 97% reduction in hair breakage* Deep Protect Density Mask deeply conditions dry or colored hair. (*Based on hair length of 12 inch/30cm, measured by weight of broken hair vs. non-conditioning shampoo) protecting hair against damage for all hair types, including curly hair.