Say hello 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. Keep nails protected with the OPI Nail Envy Nail Strengthener. A nail treatment that features Tri-Flex Technology™ to help strengthen weak or damaged nails. The liquid shield with vegan formula, reinforces the nail, to help protect against chipping, peeling and splitting.