Nail Envy Nail Strengthener Matte Formula provides Original Nail Envy results with a natural-looking matte finish for invisible protection. Also an exceptional base coat for nail lacquer! Strengthens natural nails.OPI has developed a different formula to meet your individual needs. Application is simple. Apply two coats to your bare nail and 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!