Postquam styling products: Keratin Straightening Mask. This creamy-textured mask delivers hydration, nourishment, and repair throughout the straightening process. Enriched with hydrolyzed keratin, it effectively restores the hair fiber, resulting in a smooth and uniform appearance, enhancing softness and shine. Shea butter serves as a hydrating agent. To use, apply the product to damp hair, leave it on for 15 minutes, then rinse thoroughly with warm water. After rinsing, continue by blow-drying your hair.