Invidia nails that strengthens the nail polish treatment OPI | Envy nail polish OPI and strengthening with wheat protein and calcium, hardens nails in a big way thanks to Tri-Flex Technology™, a liquid shield that strengthens the nail with layered construction. Our vegan formula strengthens and protects nails from chipping, peeling and breaking, resulting in healthy, vibrant nails that everyone will envy. Without ingredients or by-products of origin animale Advantages: | Nails 95%* stronger in 1 week | 94%* of consumers say their nails improve instantly 98% of consumers say their nails feel more nourished after a week | *If used as directed. ** Test performed on 108 people after using the product for 7 days.