Product Description Natural Nail Strengthener to Maintain Healthy Nails with Hydrolyzed Wheat Protein & Calcium. Benefits Strength is beauty & OPI delivers strength with its range of Nail Envy natural nail strengtheners. OPI has developed a different formula to meet your individual needs. Application is simple. Apply two coats to your bare nail & then apply one coat every other day to maintain your treatment. You can also use Nail Envy over lacquer so there are no excuses for not getting nails to envy!