Syoss Intensive care mask for dry and damaged hair. Repair boost deeply nourishes and repairs hair and helps prevent future damages. Our HIGH CONCENTRATE formulas are expertly crafted and inspired by Japanese beauty principles. Asian inspired natural ingredients are combined with 5 TIMES MORE AMINO ACIDS*, the building blocks of hair, to assure extra effective performance for a strong and healthy looking hair.Use: MULTI-PURPOSE MASK:1. PRE-SHAMPOO: For easier care. Apply gently to wet or dry hair and rinse thoroughly. Use regularly.2. BALSAM: Apply gently to wet hair after shampooing and rinse thoroughly. 3. MASK: For deep conditioning care. Apply gently to wet hair after washing and leave on for 2 to 3 minutes. Rinse thoroughly. Use 2-3 times per week.4. NATMASK: For intensive care. Apply a small amount to dry or towel-dried hair. Leave in overnight and wash out the next day. Use 1-2 times per week. 500 ml SYOSS Repair Boost Mask 500 ml