Toughen up your nails with a crisp white  Alpine Snow nail strengthener from OPI's Nail Envy, a vegan formula that reinforces and protects nails with layer-building strength. This iconic bright white nail strengthener will toughen up nails big time thanks to Tri-Flex Technology, a liquid shield that reinforces the nail with layer-building strength. Our vegan formula* strengthens and protects against chipping, peeling, and splitting, resulting in healthy-looking, vibrant nails that everyone will envy. HOW TO USE: Apply 2 coats to bare nails followed by an additional coat daily. Remove on day 7 if desired. Professional salon application: Use in between professional services–no base coat needed.  Full Coverage