Weak, damaged nails are no match for OPI Nail Envy! Added calcium and protein builds manicure-ready nails that are harder, longer and stronger than ever before. This specially formulated strengthener helps to thicken soft and thin nails and adds an extra layer of protection. For best results, apply two coats on natural nails the first day of use, followed by one coat every other day for 7 days. Remove weekly to allow nails time to breathe. If desired, you can also apply to coats of OPI Nail Lacquer over the top and finish with OPI top coat for an awesome manicure with great shine and staying power.