A restorative hair mask for extremely damaged hair that intensely strengthens to protect against breakage for smoother, softer hair with enhanced shine. Suitable for medium and thick hair types and all hair textures including straight, wavy, curly, and coily. It targets damage, split ends, breakage, dryness, and enhances shine. Key ingredients include Gluco-Peptide for deep strand strengthening, Wheat Protein Derivative for smoothing and elasticity repair, and Native Plant Cells for intense hydration and root protection. The rich formula restores hair elasticity and is recommended by professional stylists to prevent future breakage. Usage instructions involve applying after shampoo, massaging through mid-lengths and ends, leaving for 5-35 minutes depending on hair type, then rinsing thoroughly. It is part of the Kérastase Resistance collection and should be used with complementary products for optimal results.