Schwarzkopf PROFESSIONAL BC KUR a Form Control Hair Mask Refill, 500gFormulated with hair softening ingredients acetyl cysteine, kiwi extract, and jojoba oil, hair repair ingredients ceramide and 18 Perfector, and hair protection ingredients high extension oil. It penetrates deep into damaged, frizzy hair, softening it while making it hydrophobic from the inside out. It repairs the lipids in the cuticle, blocking moisture and leaving hair manageable. Use once or twice a week for intensive special care.