REPAIR & STRENGTHEN 7 Tresemmé mask. Mask that repairs 7 damages in a single use. Its biotin formula is responsible for instantly repairing visible damage, while helping to repair the hair fiber from within. Leaves hair strong, healthy and manageable. It has an infusion of macadamia oil, wheat protein and avocado. Apply to wet hair from medium to ends, leave to act for 2-3 minutes and rinse.