The Penetraitt Hair Mask by Sebastian Professional, in 500 ml, is a una regenerating mask specifically formulated for weakened and damaged hair. Thanks to its innovative formula, it penetrates deeply into the hair fiber, intensely strengthening and repairing stressed locks. It provides softness, elasticity, and protection against external aggressions, restoring vitality and immediate shine. Ideal for those seeking an effective professional treatment that deeply regenerates for visibly healthier and more resilient hair.