OPI Nail Envy Original Nail Strengthener This iconic nail strengthener now features Tri-Flex Technology™ to strengthen and protect nails against chipping, peeling, and splitting. The result? Healthy-looking, beautiful nails that are 95% stronger in 1 week. Say hellooo to the next generation of Nail Envy® nail strengtheners, now with Tri-Flex Technology™, a liquid shield that reinforces the nail with layer-building strength. Also infused with biotin, calcium, vitamins A, C, and E, this vegan formula* strengthens and protects against chipping, peeling, and splitting, resulting in healthy-looking, beautiful nails. *No animal-derived ingredients or by-products. Benefits Nails are 95% stronger in 1 week. 94% of consumers said nails instantly improved. 98% of consumers agree nails feel nourished after 1 week. Free of Formaldehyde, Formaldehyde Resin, Toluene, Xylene, Dibutyl phthalate (DBP), Camphor, Parabens, Ethyl Tosylamide, and Triphenyl Phosphate. Use Apply 2 coats to bare nails followed by an additional coat daily. Remove on day 7 if desired. Pro tip: Use as a base coat before applying color like Nail Lacquer to help strengthen the natural nail.