TRESemmé Keratin Mask is a hair mask enriched with keratin protein that deeply nourishes and strengthens hair strands. This mask helps to repair and protect hair from damage caused by heat styling and chemical treatments. It leaves hair feeling smoother, shinier, and more manageable. The 300 ml jar is perfect for use at home and can be used on all hair types. For best results, use once a week in place of regular conditioner.