OPI Repair Mode serum rebuilds your nails from within. This bond-building treatment uses patented technology to penetrate the nail surface, creating new bonds for 99% keratin repair. Nails appear visibly improved after just one application, leading to stronger, smoother, and more resilient nails with continued use. Say goodbye to breakage, ridges, and discoloration, and hello to healthy, revitalized nails. This serum helps to completely reprogram nails, leaving them looking and feeling their best.