Ouidad | Advanced Climate Control Frizz-Fighting Mask [12.0 oz]An expertly formulated hair mask featuring key ingredients such as vitamin C and castor oil to define and strengthen curls while providing balanced moisture for long lasting curl definition. By sealing the hair's cuticle, this mask effectively locks in moisture and prevents humidity from causing frizz, resulting in defined and frizz free curls. With regular use, it can also repair and nourish curls, providing a solid foundation for frizz prevention.