Free shipping and returns on Living proof® Restore Repair Hair Mask at Nordstrom.com. What it is: A rich, reparative formula that works to revitalize dry, damaged hair in just five short minutes.What it does: The hair mask is formulated to nourish and replenish strands, but also helps to smooth the cuticle for softer, shinier and healthier-looking hair.How to use: After shampooing, apply the hair mask generously from roots to ends, and leave on for five minutes. Rinse hair. Use 1 to 2 times…